NEET Biology Neural Control and Coordination Question Bank

done Self Evaluation Test - Neural Control and Co-ordination Total Questions - 125

• question_answer1)
  Which of the following controls reflex action?
  A)
  Central nervous system done clear
  B)
  Sympathetic nervous system done clear
  C)
  Parasympathetic nervous system done clear
  D)
  Sensory nerves done clear
  View Solution play_arrow

• question_answer2)
  Perception of colour is possible among:
  A)
  Birds                 done clear
  B)
         Reptiles done clear
  C)
  Men                  done clear
  D)
         Both [a] and [c] done clear
  View Solution play_arrow

• question_answer3)
  Match the column-I (various phase of an action potential) with column-II (ionic activity associated) and choose the correct option.

  	Column-I		Column-II
  A.	Resting stage of a neuron	I.	Opening and then closing of the
  B.	Depolarisation phase in the generation of action potential.	II.	All voltage gated sodium and potassium channels are closed.
  C.	Repolarisation phase in the generation of action potential	III.	The sodium channels remain opened.
  D.	Absolute refractory phase.	IV.	Opening of potassium gates and the rushing of potassium

  A)
  A-II;    B-I;    C-IV;   D-III done clear
  B)
  A-I;     B-II;   C-III;   D-IV done clear
  C)
  A-III;    B-IV; C-I;     D-II done clear
  D)
  A-IV;   B-II;   C-III;   D-I done clear
  View Solution play_arrow

• question_answer4)
  In the given diagram of brain what does "1" represent?
  A)
  Pons                 done clear
  B)
         Midbrain done clear
  C)
  Cerebellum      done clear
  D)
         Medulla oblongata done clear
  View Solution play_arrow

• question_answer5)
  Nerve fibres are surrounded by an insulating fatty layer called:
  A)
  Adipose sheath   done clear
  B)
         Myelin sheath done clear
  C)
  Hyaline sheath   done clear
  D)
  Peritoneum done clear
  View Solution play_arrow

• question_answer6)
  Which of the following disorder of eyes caused by UV radiations?
  A)
  Cataract            done clear
  B)
         Glaucoma done clear
  C)
  Dilation pupil done clear
  D)
  Some defect of retina done clear
  View Solution play_arrow

• question_answer7)
  The human eye is sensitive only to light having wavelength ranging from:
  A)
  80 to 280 nanometre done clear
  B)
  380 to 760 nanometre done clear
  C)
  780 to 870 nanometre done clear
  D)
  880 to 980 nanometre done clear
  View Solution play_arrow

• question_answer8)
  "X" is spiral shaped structure (given below) consisting of hair cells that serve as receptors for auditory stimuli. Identify "X" and its label & location (marked as 1, 2, 3 and 4) from the given diagrammatic representation of the sectional view of cochlea.
  A)
  X- Organ of corti, 2, 3. done clear
  B)
  X- Eustachian tube, 1, 2. done clear
  C)
  X- Semicircular canal, 3, 4. done clear
  D)
  X- Crista ampullaris, 1, 4. done clear
  View Solution play_arrow

• question_answer9)
  Three layers in eye ball from inside out are:
  A)
  Retina, choroid, sclerotic done clear
  B)
  Choroid, retina, sclerotic done clear
  C)
  Sclerotic, choroid, retina done clear
  D)
  Sclerotic, retina, choroid done clear
  View Solution play_arrow

• question_answer10)
  Eye muscles are innervated by:
  A)
  Oculomotor, abducens and vagus done clear
  B)
  Oculomotor, trochlear and abducens done clear
  C)
  Oculomotor, abducens and facial done clear
  D)
  Oculomotor, facial and vagus done clear
  View Solution play_arrow

• question_answer11)
  The neural phenomenon depicted by the given diagram is best described as:   
  A)
  Spatial summation done clear
  B)
  Temporal summation done clear
  C)
  Presynaptic excitation done clear
  D)
  Presynaptic inhibition done clear
  View Solution play_arrow

• question_answer12)
  Which of the following is devoid of blood supply?
  A)
  Retina               done clear
  B)
         Choroid done clear
  C)
  Cornea          done clear
  D)
         Scleroid done clear
  View Solution play_arrow

• question_answer13)
  Clusters of neuron cell bodies embedded in the white matter of the brain are referred to as:
  A)
  Nuclei                done clear
  B)
         Gyri done clear
  C)
  Suici                             done clear
  D)
  Ganglia done clear
  View Solution play_arrow

• question_answer14)
  Which of the following statements is correct regarding a myelinated nerve fibre?

  (i) It is always associated with an axon.

  (ii) It allows rapid conduction of nerve impulses.

  (iii) It allows slow conduction of nerve impulses.

  (iv) It has nodes of Ranvier.

  A)
  Only (i) and (ii) done clear
  B)
  Only (i), (ii), and (iii) done clear
  C)
  Only (i), (ii), and (iv) done clear
  D)
  Only (i), (iii), and (iv) done clear
  View Solution play_arrow

• question_answer15)
  The resting membrane potential for neuron A is -70m V, while the resting potential for neuron B is -50m V. The threshold voltage for the production of an action potential is -35mV for both neurons. Which of the following statements is incorrect?    
  A)
  Neuron A must depolarise by 35mV to reach the threshold voltage. done clear
  B)
  Neuron B must hyperpolarise by 15mV to reach the threshold voltage. done clear
  C)
  The inside of bothneurons is negatively charged with respect to the outside. done clear
  D)
  A single EPSP received by neuron A would cause it to depolarise slightly. done clear
  View Solution play_arrow

• question_answer16)
  Which of the following substances can cure Parkinson's disease?
  A)
  GABA             done clear
  B)
         Acetylcholine done clear
  C)
  Dopamine          done clear
  D)
         Glutamic acid done clear
  View Solution play_arrow

• question_answer17)
  Eustachian tube connects:
  A)
  External ear with middle ear done clear
  B)
  External ear with internal ear done clear
  C)
  Middle ear with pharynx done clear
  D)
  Internal pharyax done clear
  View Solution play_arrow

• question_answer18)
  The accompanying diagram shows the structure of neuron. Identity 1 to 5.
  A)

  1	2	3	4	5
  Nerve fibre	Cyton or cell body	Schwann cell	Node of Ranvier	Synaptic Knob

    done clear
  B)

  Dendrites

  Cyton or cell body

  Schwann cell

  Node of Ranvier

  Synaptic Knob

    done clear
  C)

  Dendrites

  Schwann cell

  Node of Ranvier

  Synaptic Knob

    done clear
  D)

  Dendrites

  Cyton or cell body

  Nerve cell

  Node of Ranvier

  Synaptic Knob

    done clear
  View Solution play_arrow

• question_answer19)
  In the given figure of synapse few structure are marked as 1, 2, 3, and 4. Study the figure carefully and identify the structure which transmits signal across a chemical synapse.   
  A)
  1          done clear
  B)
                     2 done clear
  C)
  3                                  done clear
  D)
  4 done clear
  View Solution play_arrow

• question_answer20)
  The primary cause for the existence of resting membrane potential can be attributed to:
  A)
  Potassium diffusion potential done clear
  B)
  Presence of electrogenic pump done clear
  C)
  Diffusion potentials of \[N{{a}^{+}},{{K}^{+}}andC{{l}^{-}}\] done clear
  D)
  Anions like proteins, phosphates and sulphates. done clear
  View Solution play_arrow

• question_answer21)
  The given diagram shows the axon terminal and synapse with few part labelled as 1, 2, 3 & 4. Choose the correct combination of labelling from the given options.
  A)
  1-Synaptic vesicle, 2-Axon terminal, 3-Synaptic cleft, 4-Postsynaptic membrane done clear
  B)
  1-Axon terminal, 2-Synaptic vesicle, 3-Postsynaptic membrane, 4-Synaptic cleft. done clear
  C)
  1-Synaptic vesicle, 2-Synaptic cleft, 3-Axon terminal, 4-Post synaptic membrane done clear
  D)
  1 -Post synaptic membrane, 2-Axon terminal, 3-Synaptic vesicle, 4-Synaptic cleft done clear
  View Solution play_arrow

• question_answer22)
  Match the column-I with column-II and select the correct option.

  	Column-I		Column-II
  A.	Cervical nerves	I.	5 pairs
  B.	Thoracic nerves	II.	1pair
  C.	Lumbar nerves	III.	12 pairs
  D.	Coccygeal nerves	IV.	8 Pairs

  A)
  A- II;     B- IV;   C- I;    D- III done clear
  B)
  A- IV;    B - III;    C - I;    D - II done clear
  C)
  A- III;     B - I;      C - II;   D - IV done clear
  D)
  A- IV;    B- I;       C- II;     D- III done clear
  View Solution play_arrow

• question_answer23)
  The mandibular nerve is the branch of which cranial nerve?
  A)
  II                      done clear
  B)
         III done clear
  C)
  V                      done clear
  D)
  VI done clear
  View Solution play_arrow

• question_answer24)
  Select the correct match of the types of neuron given in column-I with its location given in column-II.

  	Column-I		Column-II
  A.	Sclera	I.	The visible coloured portion of the eye.
  B.	Choroid	II.	Its diameter is regulated by the muscle fibres of iris.
  C.	Pupil	III.	Composed of a dense connective tissue
  D.	Fovea	IV.	Portion of the retina where only the cones are densely packed
  E.	Iris	V.	Contains many blood vessels and looks bluish in colour

  A)
  A-I;      B-II;    C-III;   D-IV;   E-V done clear
  B)
  A-III;    B-V;    C-II;    D-IV;   E-I done clear
  C)
  A-IV;    B-I;      C-V;   D-II;    E-III done clear
  D)
  A-V;     B-IV;   C-III;   D-I;     E-II done clear
  View Solution play_arrow

• question_answer25)
  The given diagram shows different parts of human eye with one part labeled as X. Which the following statement is correct regarding label X?
  A)
  It is the opening in lens that permits light into the inner chambers of the eye. done clear
  B)
  It is the coloured portion of vascular tunic. done clear
  C)
  It is a biconcave structure that changes shape to bring objects into focus. done clear
  D)
  It is thick, jelly-like substance in the posterior compartment of the eye. done clear
  View Solution play_arrow

• question_answer26)
  The size of aperture of the pupil of one eye is controlled by:
  A)
  Iris                    done clear
  B)
         Retina done clear
  C)
  Cornea          done clear
  D)
         Conjunctiva done clear
  View Solution play_arrow

• question_answer27)
  Refer the given figure of ear with few structure marked as 1, 2, 3 & 4. Which labelled structure converts sound waves into mechanical vibrations?           
  A)
  1                      done clear
  B)
         2 done clear
  C)
  3                      done clear
  D)
         4 done clear
  View Solution play_arrow

• question_answer28)
  Part of mammalian brain controlling muscular coordination is:
  A)
  Cerebrum           done clear
  B)
         Corpus callosum done clear
  C)
  Medulla oblongata done clear
  D)
  Cerebellum done clear
  View Solution play_arrow

• question_answer29)
  Cranial nerve showing maximum branching is:
  A)
  Trigeminal       done clear
  B)
         Vagus done clear
  C)
  Optic                             done clear
  D)
  Facial done clear
  View Solution play_arrow

• question_answer30)
  The given diagram represents the sectional vie I of cochlea with few part labelled as 1, 2, 3 & 4. The movement of which marked label causes hair cell microvilli to bend back and forth.                                  
  A)
  1                      done clear
  B)
         2 done clear
  C)
  3                      done clear
  D)
         4 done clear
  View Solution play_arrow

• question_answer31)
  In the given figure of eye, few parts are labelled as 1, 2, 3 and 4. Select the option which shows the correct identification of the part with its characteristics.                              
  A)
  1: Choroid, it contains ganglion cells, bipolar cells and photoreceptor cells. done clear
  B)
  2: Iris, it is responsible for controlling the diameter and size of the pupil and thus the amount of light reaching the retina. done clear
  C)
  3: Blind spot, it is a yellowish pigmented spot called macula lutea with a central pit called the fovea. done clear
  D)
  4: Cornea, it is a transparent front part of the eye that covers the iris, pupil, and anterior chamber. done clear
  View Solution play_arrow

• question_answer32)
  Glands of Swammerdam are found associated with:
  A)
  Cranial nerves    done clear
  B)
         Pancreas done clear
  C)
  Spinal nerves     done clear
  D)
         Liver done clear
  View Solution play_arrow

• question_answer33)
  Which part of the brain is more develop human?
  A)
  Medulla         done clear
  B)
         Cerebellum done clear
  C)
  Cerebrum        done clear
  D)
         Optic lobes done clear
  View Solution play_arrow

• question_answer34)
  When a membrane is at the resting potential, the concentration of:         
  A)
  Sodium and potassium ions is higher on the inside of its membrane. done clear
  B)
  Sodium and potassium ions is higher on the outside of its membrane. done clear
  C)
  Sodium ions is higher on the inside of its membrane and of potassium ions is higher on the outside. done clear
  D)
  Sodium ions is higher on the outside of its membrane and of potassium ions is higher on the inside. done clear
  View Solution play_arrow

• question_answer35)
  How are neurons structurally adapted to chemically transmit impulses to neighboring neurons?
  A)
  The trigger zone is near the cell body. done clear
  B)
  Axon terminals contain neurotransmitter substances within synaptic vesicles. done clear
  C)
  Schwann cells surround axons. done clear
  D)
  They have numerous dendrites. done clear
  View Solution play_arrow

• question_answer36)
  Dopamine acetylcholine and GABA are:
  A)
  Hormone        done clear
  B)
         Enzyme done clear
  C)
  Synthetic vitamin            done clear
  D)
  Neurotransmitters done clear
  View Solution play_arrow

• question_answer37)
  Four events in the transmission of nerve impulses across synapses are given below.

  (i) Depolarisation of the presynaptic membrane.

  (ii) Propagation of postsynaptic action potential.

  (iii) Hydrolysis of transmitter substance.

  (iv) Rupturing of synaptic vesicles.

  In which sequence do these events occur?

  A)
  (i)\[\to \](iii) \[\to \] (ii) \[\to \] (iv) done clear
  B)
  (i)\[\to \](iv)\[\to \](ii) \[\to \] (iii) done clear
  C)
  (iv)\[\to \](i)\[\to \](iii)\[\to \](ii) done clear
  D)
  (iv)\[\to \](iii)\[\to \](i)\[\to \] (ii) done clear
  View Solution play_arrow

• question_answer38)
  Area of cerebral cortex controlling vision is:
  A)
  Frontal lobe      done clear
  B)
  Parietal lobe done clear
  C)
  Temporal lobe    done clear
  D)
         Occipital lobe done clear
  View Solution play_arrow

• question_answer39)
  Absolute refractory period during nerve impulse conduction is the period of: 
  A)
  Repolarisation     done clear
  B)
          Depolarisation done clear
  C)
  Both repolarisation and depolarization done clear
  D)
  Neither repolarisation nor depolarisation done clear
  View Solution play_arrow

• question_answer40)
  The anterior choroid plexus forms the roof of:
  A)
  Optocoel            done clear
  B)
         4th ventricle done clear
  C)
  Diocoel  done clear
  D)
         Olfactory ventricle done clear
  View Solution play_arrow

• question_answer41)
  A thin vascular membrane of brain is:
  A)
  Arachnoid      done clear
  B)
         Piameter done clear
  C)
  Durameter       done clear
  D)
         Epineurium done clear
  View Solution play_arrow

• question_answer42)
  Seventh cranial nerve enters:
  A)
  Jugular ganglion done clear
  B)
                     Geniculate ganglion done clear
  C)
  Gasserian ganglion          done clear
  D)
  Femoral ganglion done clear
  View Solution play_arrow

• question_answer43)
  Several nervous system diseases result from a loss of support cells or of substances produced by support cells (such as myelin). The primary function of these support cells is to:
  A)
  Act as supporting structures within nervous tissue. done clear
  B)
  Produce insulating material around axons. done clear
  C)
  Assist in the conduction of impulses along neurons. done clear
  D)
  All of the above done clear
  View Solution play_arrow

• question_answer44)
  The set of mixed nerve is:    
  A)
  Optic, auditory, olfactory done clear
  B)
  Auditory, trigeminal, hypoglossal done clear
  C)
  Occulomotor, pathetic, abducens done clear
  D)
  Vagus, facial, trigeminal done clear
  View Solution play_arrow

• question_answer45)
  In static condition, the body balance is sensed by:
  A)
  Crista                done clear
  B)
         Macula done clear
  C)
  Both [a] and [b] done clear
  D)
  Cochlear canal done clear
  View Solution play_arrow

• question_answer46)
  Given below is a table comparing the effects of sympathetic and parasympathetic nervous system. Which of the following feature is correctly described?
  A)

  Feature	Sympathetic nervous system	Parasympathetic nervous system
  Salivary glands	Stimulates secretion	Inhibits secretion

    done clear
  B)

  Pupil of eye

  Dilates

  Constricts

    done clear
  C)

  Heart rate

  Decreases

  Increases

    done clear
  D)

  Intestinal peristalsis

  Stimulates secretion

  Inhibits secretion

    done clear
  View Solution play_arrow

• question_answer47)
  Eye lens focus light on the retina containing rod cells, which are receptors. Number of rod cells in eyes are:                 
  A)
  120 million         done clear
  B)
  105 million done clear
  C)
  150 million       done clear
  D)
         118 million done clear
  View Solution play_arrow

• question_answer48)
  A particular disease of the nervous system specifically involves the\[C{{a}^{2+}}\] ion channels at the chemical synapses of motor neurons where neurotransmitter is stored and released. In other words, this disease affects the
  A)
  Axon terminals of the presynaptic cell and the release of acetylcholine. done clear
  B)
  Axon terminals of the postsynaptic cell and the release of \[{{K}^{+}}\] ions. done clear
  C)
  Electrical synapses. done clear
  D)
  Axon terminals of the presynaptic cell and the release of \[{{K}^{+}}\] ions. done clear
  View Solution play_arrow

• question_answer49)
  Organs of Ruffini are receptors of:
  A)
  Cold                  done clear
  B)
         Pressure done clear
  C)
  Heat                             done clear
  D)
  Touch done clear
  View Solution play_arrow

• question_answer50)
  Ora serrata is:
  A)
  Oral cavity of protochordates. done clear
  B)
  Anterior edge of sensory portion of the retina. done clear
  C)
  Taste receptor. done clear
  D)
  A part of utriculus of ear. done clear
  View Solution play_arrow

• question_answer51)
  Which of the following statements is false about the electrical synapse?   

  (i) At electrical synapses, the membranes of pre and post synaptic neurons are in very close proximity.

  (ii) Electrical current can flow directly from one neuron into the other across the synapses.

  (iii) Transmission of an impulse across electrical synapses is very similar to impulse conduction along single axon.

  (iv) Electrical synapses pass electrical signal between cells with the use of acetylcholine (Ach).

  (v) Electrical synapses are fast rare in our system.

  A)
  (i) and (ii)       done clear
  B)
         Only (ii) done clear
  C)
  Only (iv)        done clear
  D)
         Only (v) done clear
  View Solution play_arrow

• question_answer52)
  Which of the following statement is correct regarding the organ of eye-sight?
  A)
  The space between cornea and lens is filled with transparent gel. done clear
  B)
  When all cones are stimulated equally, sensation of no light (dark) is produced. done clear
  C)
  Rhodopsin is purplish red protein, hence called visual purple. done clear
  D)
  The anterior transparent portion of choroid is called cornea. done clear
  View Solution play_arrow

• question_answer53)
  Which of the following is the largest nerve?
  A)
  Vagus            done clear
  B)
         Olfactory done clear
  C)
  Trigeminal       done clear
  D)
         Glossopharyngeal done clear
  View Solution play_arrow

• question_answer54)
  Which one is the spinal nerve?
  A)
  Trigeminal       done clear
  B)
         Hypoglossal done clear
  C)
  Olfactory        done clear
  D)
         None of these done clear
  View Solution play_arrow

• question_answer55)
  The following statements about nerve metabolism excitation and conduction are true except:
  A)
  Nerve fibre can be excited under anaerobic conditions. done clear
  B)
  Nerve conduction proceeds in the absence of oxygen and development of action potential does not depend on metabolism immediately. done clear
  C)
  In the absence of oxygen, action potential can be generated and nerve conduction proceeds, but later, it fails as the \[N{{a}^{+}}\] pump cannot operate. done clear
  D)
  At rest, the oxygen consumption in the brain is lesser than what is seen in a nerve. done clear
  View Solution play_arrow

• question_answer56)
  Match the given terms in column-I with its definition given in column-II and choose the correct options.

  	Column-I		Column-II
  A.	Semi-circular canal	I.	Spiral organ of Corti
  B.	Vestibule	II.	Fluid found in the scala vestibule and scala tympani.
  C.	Cochlea	III.	Evaluates rotational motion
  D.	Perilymph	IV.	Fluid found within the  Organ of Corti
  E.	Endolymph	V.	Responds to gravity and movements of the head

  A)
  A-III;    B-V;    C-I;      D-II;     E-IV done clear
  B)
  A-I;      B-II;     C-III;    D-IV;   E-V done clear
  C)
  A-II;     B-III;    C-IV;   D-V;     E-I done clear
  D)
  A-IV;    B-I;      C-V;    D-II;     E-III done clear
  View Solution play_arrow

• question_answer57)
  A fall in ECF, \[{{K}^{+}}\] concentration would cause:
  A)
  Hyperpolarisation of cell membrane. done clear
  B)
  Decrease in membrane potential. done clear
  C)
  Increases \[N{{a}^{+}}\] current into the cell. done clear
  D)
  Stimulation of electrogenic pump. done clear
  View Solution play_arrow

• question_answer58)
  'Ishihara charts' are used by ophthalmologists to detect:                    
  A)
  Visual acuity        done clear
  B)
     Night blindness done clear
  C)
  Colourblindness done clear
  D)
         Microbial infection done clear
  View Solution play_arrow

• question_answer59)
  One group of neurotransmitter receptors is the metabotropic receptors. Which one of the following statements about metabotropic receptors is false?
  A)
  Both muscanaric and p-adrenergic receptors are metabotropic receptors. done clear
  B)
  Metabotropic receptors are coupled with A proteins. done clear
  C)
  Metabotropic receptors can stimulate gene expression. done clear
  D)
  Muscanaric receptors bind with acetylcholine. done clear
  View Solution play_arrow

• question_answer60)
  Which of the following statements is correct?
  A)
  The internal ear receives sound waves and directs them to the ear drum. done clear
  B)
  The membranous canals are suspended in the endolymph of the bony canals. done clear
  C)
  The ear ossicles increase the efficiency of transmission of sound waves to the inner ear. done clear
  D)
  The malleus is attached to the oval window and the stapes is attached to the temporal membrane of the cochlea. done clear
  View Solution play_arrow

• question_answer61)
  Which of the following terms is not correctly matched with its feature?
  A)
  Efferent neurons - Carries signals from CNS to the effector. done clear
  B)
  Axon terminal - Possess neurotransmitter containing vesicle. done clear
  C)
  Limbic system - Along with the hypothalamus, it is involved in the regulation of sexual behaviour, expression of emotional reactions and motivation. done clear
  D)
  Association areas - Present in cerebellum and responsible for functions like intersensory associations, memory and communication. done clear
  View Solution play_arrow

• question_answer62)
  Which of the following statement is incorrect?
  A)
  The ear ossicle attached to tympanic membrane is malleus. done clear
  B)
  Opsin (of rhodopsin) develops from vitamin A. done clear
  C)
  The pressure on ear drum is equalised by Eustachian tube. done clear
  D)
  Otolith organ consists of saccule and utricle. done clear
  View Solution play_arrow

• question_answer63)
  Identify the correct match of types of neurons with its location.

  (i) Unipolar neuron	Embryonic stage
  (ii) Bipolar neuron	Cornea of eyes
  (iii) Multipolar neuron	Cerebral cortex

  A)
  (i) and (ii) only done clear
  B)
         (ii) and (iii) only done clear
  C)
  (i) and (iii) only done clear
  D)
         All of the above done clear
  View Solution play_arrow

• question_answer64)
  Refer the given figure which shows the axon terminal and synapse with their parts marked as 1 to 7. Identify the correct parts whose constitution forms the structure of synapse.        
  A)
  1, 2, 3               done clear
  B)
         3, 4, 5 done clear
  C)
  4, 5, 6               done clear
  D)
         5, 6, 7 done clear
  View Solution play_arrow

• question_answer65)
  Trochlear nerve supplies:
  A)
  Nasal epithelium done clear
  B)
  Superior oblique eye muscles done clear
  C)
  Inferior oblique eye muscle done clear
  D)
  Superior rectus eye muscle. done clear
  View Solution play_arrow

• question_answer66)
  An axon has four terminal ends connected with dendrites of four different neurons. Its nerve impulse will:
  A)
  Become weak due to distribution into four. done clear
  B)
  Travel in all the four neurons with equal strength. done clear
  C)
  Pass on to one neuron only. done clear
  D)
  Travel to none because the movement of impulse is from dendrite to axon.             done clear
  View Solution play_arrow

• question_answer67)
  The diagram shows the sequence of events occurring as an action potential arrives at a synapse. The numbered arrows represent the movement of substances across the membranes. What are the substances moving across the membranes?
  A)

  1	2	3	4	5
  \[{{K}^{+}}\]	\[N{{a}^{+}}\]	Ach.	\[C{{a}^{2+}}\]	\[{{K}^{+}}\]

    done clear
  B)

  \[{{K}^{+}}\]

  \[N{{a}^{+}}\]

  \[{{K}^{+}}\]

  \[C{{a}^{2+}}\]

  Ach.

    done clear
  C)

  \[N{{a}^{+}}\]

  \[{{K}^{+}}\]

  \[C{{a}^{2+}}\]

  Ach.

  \[N{{a}^{+}}\]

    done clear
  D)

  \[N{{a}^{+}}\]

  \[{{K}^{+}}\]

  \[N{{a}^{+}}\]

  Ach.

  \[C{{a}^{2+}}\]

    done clear
  View Solution play_arrow

• question_answer68)
  Receptors which are sensitive to pain are known as:
  A)
  Rheoreceptor     done clear
  B)
  Algesireceptors done clear
  C)
  Tangoreceptors               done clear
  D)
  Mechanoreceptors done clear
  View Solution play_arrow

• question_answer69)
  A circular canal which is found in limbus part of eyes is called:
  A)
  Hyaloid canal done clear
  B)
         Canal of Schlemm done clear
  C)
  Canal of Cloquet done clear
  D)
  Eustachian tube done clear
  View Solution play_arrow

• question_answer70)
  An example of autonomous nervous system is:
  A)
  Swallowing food done clear
  B)
         Pupillary reflex done clear
  C)
  Peristalsis of intestine       done clear
  D)
  Knee-jerk response done clear
  View Solution play_arrow

• question_answer71)
  The eyes of tigers and wolves shine (reflect back the light focused on them) because:
  A)
  Cornea is opaque done clear
  B)
    Retina does not have enough rods done clear
  C)
  Retina has only rods and no cones done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer72)
  Our ear can hear the frequency of sound waves
  A)
  20 to 20,000 cycles/sec   done clear
  B)
  1000 to 2000 cycles/sec   done clear
  C)
  5000 to 7000 cycles/sec done clear
  D)
  5000 to 10,000 cycles/sec done clear
  View Solution play_arrow

• question_answer73)
  In the blind spot, where the optic nerves leave the eye:
  A)
  Rods and cones are absent. done clear
  B)
  Only cones are present. done clear
  C)
  Only rods are present. done clear
  D)
  Special neurons are present. done clear
  View Solution play_arrow

• question_answer74)
  Part of brain responsible for hearing is:
  A)
  Cerebellum      done clear
  B)
         Cerebrum done clear
  C)
  Medulla             done clear
  D)
  Hypothalamus done clear
  View Solution play_arrow

• question_answer75)
  Fenestra ovalis is the opening of:
  A)
  Cranium        done clear
  B)
         Tympanum done clear
  C)
  Tympanic cavity             done clear
  D)
  Brain done clear
  View Solution play_arrow

• question_answer76)
  Which is not a reflex action?
  A)
  Swallowing of food done clear
  B)
  Shivering in cold done clear
  C)
  Salivation at choicest food done clear
  D)
  Closure of eyelid by flashing light done clear
  View Solution play_arrow

• question_answer77)
  No image formation occurs on blind-spot of retina because:       
  A)
  It is not present on the optical axis of the eye. done clear
  B)
  Here cones and rods are absent. done clear
  C)
  On this part only cones are present. done clear
  D)
  The nerve fibres of this region do not contribute in the formation of optic chiasma. done clear
  View Solution play_arrow

• question_answer78)
  Center for sense of smell is:
  A)
  Cerebellum      done clear
  B)
         Olfactory lobes done clear
  C)
  Cerebrum        done clear
  D)
         Midbrain done clear
  View Solution play_arrow

• question_answer79)
  Route of reflex arc is:    
  A)
  Receptors, effectors, grey mater and motor fibres done clear
  B)
  Receptors, sensory fibres, grey mater, motor fibres and effectors done clear
  C)
  Sensory fibres, grey mater, motor-fibres, receptors and effectors done clear
  D)
  Effectors, grey mater, motor, sensory fibres and receptors done clear
  View Solution play_arrow

• question_answer80)
  The small canal leading from pinna into the head in mammals is:
  A)
  Haversian canal done clear
  B)
  Ext. auditory meatus done clear
  C)
  Inguinal canal done clear
  D)
  Eustachian tube done clear
  View Solution play_arrow

• question_answer81)
  Ear drum is known as:
  A)
  Tympanic membrane      done clear
  B)
  Tensor tympani done clear
  C)
  Scala tympani done clear
  D)
         Scala vestibule done clear
  View Solution play_arrow

• question_answer82)
  The nodes of Ranvier are:
  A)
  The points in which the axons is exposed. done clear
  B)
  The contact points found over the non-myelinated nerve fibre. done clear
  C)
  Areas in which the axons swell up. done clear
  D)
  Areas where the neurilemma touches the axon. done clear
  View Solution play_arrow

• question_answer83)
  Which of the following statement is correct?
  A)
  Electrical synapses are more common in our neural system than chemical synapses. done clear
  B)
  The new potential in post-synaptic neuron may be either excitatory or inhibitory. done clear
  C)
  Hypothalamus is the major coordination centre for sensory and motor signaling. done clear
  D)
  The tracts of nerve fibres that connect two cerebral hemispheres are called corpora bigemina. done clear
  View Solution play_arrow

• question_answer84)
  "Jumping of the action potential" at the nodes of Ranvier is known as:
  A)
  Saltatory conduction       done clear
  B)
  Neurotransmission done clear
  C)
  Recovery phase  done clear
  D)
  Active phase done clear
  View Solution play_arrow

• question_answer85)
  The rods and cones of the eye retinal layer are modified:
  A)
  Hair                  done clear
  B)
         Unipolar neurons done clear
  C)
  Bipolar neurons  done clear
  D)
  multipolar neurons done clear
  View Solution play_arrow

• question_answer86)
  Which of the following statement is correct?
  A)
  The space within cochlea called scala media is filled with endolymph. done clear
  B)
  The vestibular apparatus is composed of two semi-circular canals and the otolith organ consisting of the saccule and utricle. done clear
  C)
  The external auditory meatus helps in equalising the pressures on either sides of the ear drum. done clear
  D)
  The membranes constituting cochlea, the Reissner's and basilar, divide the surrounding perilymph filled bony labyrinth into an upper scala tympani and a lower scala vestibuli. done clear
  View Solution play_arrow

• question_answer87)
  Neurons receive signals through their _____ and send signals to other neurons through their
  A)
  Dendrites ... receptors done clear
  B)
  End feet... cell bodies and dendrites done clear
  C)
  Cell bodies and dendrites ... axons done clear
  D)
  Transmitter vesicles ... axons done clear
  View Solution play_arrow

• question_answer88)
  Which of the following statements is incorrect about cones?

  (i) The daylight vision and colour vision are function of cones.

  (ii) In human eye, there are three types of cones having characteristic photopigments that respond to red, green and blue light.

  (iii) The sensations of different colours are produced by various combination of these 3 types of cones.

  (iv) When these 3 types of cones are stimulated equally, a sensation of white light is produced.

  A)
  Only (iv)         done clear
  B)
         Only (i) and (iv) done clear
  C)
  Only (iii)         done clear
  D)
         none of these done clear
  View Solution play_arrow

• question_answer89)
  When a physician elicits the knee-jerk reflex by tapping deep tendons in the knee, the normal response is for the lower leg to swing forward. When this happens: 
  A)
  Muscles in the back of the lower leg are contracting but that in the front are relaxing. done clear
  B)
  Muscles in the front of the lower leg are contracting but that in the back are relaxing. done clear
  C)
  Muscles in the back of the thigh are contracting but that in the front are relaxing. done clear
  D)
  Muscles in the front of the thigh are contracting but that in the back are relaxing. done clear
  View Solution play_arrow

• question_answer90)
  Which of these is an example of conditioned reflex?
  A)
  Watering of mouth at the taste of food. done clear
  B)
  Withdrawal of hand on touching a hot plate. done clear
  C)
  Cycling. done clear
  D)
  Flowing of tears while peeling- and cutting onions. done clear
  View Solution play_arrow

• question_answer91)
  In snakes, eye lids are:
  A)
  Immovable      done clear
  B)
         Movable done clear
  C)
  Absent               done clear
  D)
         All of these done clear
  View Solution play_arrow

• question_answer92)
  In mammalian eye, the power of accommodation is due to:
  A)
  Regulating light through iris done clear
  B)
  Focussing by cornea done clear
  C)
  Changing the focal length of eye lens by ciliary body done clear
  D)
  Changing the diameter of pupil done clear
  View Solution play_arrow

• question_answer93)
  Depolarisation of nerve impulse involves:
  A)
  Entry of \[N{{a}^{+}}\] only        done clear
  B)
  Entry of \[{{K}^{+}}\] only  done clear
  C)
  Entry of \[N{{a}^{+}}\] and exit of \[{{K}^{+}}\] done clear
  D)
  Entry of \[{{K}^{+}}\] and exit of \[N{{a}^{+}}\] done clear
  View Solution play_arrow

• question_answer94)
  The autonomic nervous system has control over:
  A)
  Reflex action     done clear
  B)
         Sense organs done clear
  C)
  Internal organs   done clear
  D)
         skeletal muscles done clear
  View Solution play_arrow

• question_answer95)
  Nerve impulses are initiated by nerve fibres only when the membrane shall become more permeable to:
  A)
  Adrenaline       done clear
  B)
         Phosphorus done clear
  C)
  Sodium ions       done clear
  D)
  Potassium ions done clear
  View Solution play_arrow

• question_answer96)
  The parts of the neurons that perform basic cellular functions such as protein synthesis are the:
  A)
  Axons               done clear
  B)
         Dendrites done clear
  C)
  Synaptic knobs   done clear
  D)
         Soma done clear
  View Solution play_arrow

• question_answer97)
  Which of the following correctly traces the energy of sound waves into the ear
  A)
  Auditory canal-eardrum-ear bones-cochlea done clear
  B)
  Eardrum-auditory canal-cochlea-ear bones done clear
  C)
  Auditory canal-ear bones-eardrum-cochlea done clear
  D)
  Eardrum-auditory canal-ear bones-cochlea done clear
  View Solution play_arrow

• question_answer98)
  The sense of balance is maintained with the help of:
  A)
  Hammer            done clear
  B)
         Stirrup done clear
  C)
  Semicircular canals         done clear
  D)
  Cochlea done clear
  View Solution play_arrow

• question_answer99)
  The enzyme required for the conduction of nerve impulse across synapse is:
  A)
  Peroxidase done clear
  B)
  Choline acetylase done clear
  C)
  Ascorbic acid oxidase done clear
  D)
  Succinic dehydrogenase done clear
  View Solution play_arrow

• question_answer100)
  Which is activated in stress condition?
  A)
  Somatic         done clear
  B)
         Sympathetic done clear
  C)
  Parasympathetic             done clear
  D)
  Whole ANS done clear
  View Solution play_arrow

• question_answer101)
  Ear is most sensitive to sound waves of:
  A)
  1000 cycles/sec   done clear
  B)
         10000 cycles/sec done clear
  C)
  6000 cycles/sec   done clear
  D)
         20 cycles/sec. done clear
  View Solution play_arrow

• question_answer102)
  Find out the right matching from the following pairs.
  A)
  Accommodation.................. Pupil done clear
  B)
  Colour perception.................. Cones done clear
  C)
  Night blindness.................. Rods done clear
  D)
  Binocular vision.................. Iris done clear
  View Solution play_arrow

• question_answer103)
  The pinna of the ear is composed of:
  A)
  Elastic cartilage done clear
  B)
         Hyaline cartilage done clear
  C)
  White fibrocartilage         done clear
  D)
  Bone done clear
  View Solution play_arrow

• question_answer104)
  Reflex arcs, which involve no processing in the brain, are beneficial because they permit:
  A)
  Instantaneous signaling to motor neurons. done clear
  B)
  Avoidance of dangerous stimuli, even without a previously "learned" response. done clear
  C)
  Immediate response to dangerous stimuli. done clear
  D)
  All of the above done clear
  View Solution play_arrow

• question_answer105)
  A bipolar neuron has:    
  A)
  2 dendrites and 1 axon  done clear
  B)
  2 axons and 1 dendrite done clear
  C)
  1 dendrite and 1 axon done clear
  D)
  2 axons and 2 dendrites, done clear
  View Solution play_arrow

• question_answer106)
  Vermis is a part of:
  A)
  Optic lobe        done clear
  B)
         Midbrain done clear
  C)
  Cerebellum       done clear
  D)
         Medulla oblongata done clear
  View Solution play_arrow

• question_answer107)
  An abnormal production of antidiuretic hormone (ADH) could result from a dysfunction of:
  A)
  Hypothalamus     done clear
  B)
      Choroid plexus    done clear
  C)
     Medulla oblongata done clear
  D)
  Reticular activation system done clear
  View Solution play_arrow

• question_answer108)
  In a nerve, if sodium pump is blocked, which of the following is most likely to happen?
  A)
  \[N{{a}^{+}}\] and \[{{K}^{+}}\] will increase outside the cell. done clear
  B)
  \[N{{a}^{+}}\] outside the nerve will increase. done clear
  C)
  \[N{{a}^{+}}\] inside the nerve will increase. done clear
  D)
  \[{{K}^{+}}\] inside the nerve will increase. done clear
  View Solution play_arrow

• question_answer109)
  Brain waves common to a healthy sleeping  person and a brain-damaged awake person are called:
  A)
  Alpha waves     done clear
  B)
  Beta waves done clear
  C)
  Theta waves   done clear
  D)
         Delta waves done clear
  View Solution play_arrow

• question_answer110)
  Which of the following options correctly represents the name of 1, 2, 3 and 4 in the given diagram of neuron?   
  A)
  1- Axon, 2- Dendrites, 3- Node of Ranvier, 4- Myelin sheath done clear
  B)
  1- Dendrites, 2- Axon, 3- Node of Ranvier, 4- Myelin sheath done clear
  C)
  1 - Dendrites, 2- Cell body, 3- Myelin sheath, 4- Node of Ranvier done clear
  D)
  1 - Axon, 2- Cell body, 3- Dendrites, 4-Node of Ranvier done clear
  View Solution play_arrow

• question_answer111)
  Match the column-I with column-II and select the correct option.         

  	Column-I		Column-II
  A.	Unipolar neuron	I.	In cerebral cortex
  B.	Bipolar neuron	II.	In embryonic stage
  C.	Multipolar neuron	III.	In retina of eye

  A)
  A- I;     B-II;    C-III done clear
  B)
  A-I;      B-III;   C-II done clear
  C)
  A-II;      B-I;     C-III done clear
  D)
  A-II;     B-III;    C-I done clear
  View Solution play_arrow

• question_answer112)
  Which of the following statements is correct about rods compared to cones?

  (i) Rods are most numerous in the fovea.

  (ii) Rods contain rhodopsin.

  (iii) Rods produce general outlines of objects rather than sharp images.

  (iv) Rods produce black and white but not colour images.

  A)
  (i), and (ii)          done clear
  B)
         (ii), and (iii) done clear
  C)
  (i),(ii) and (iii)     done clear
  D)
  (ii), (iii) and (iv) done clear
  View Solution play_arrow

• question_answer113)
  Which of the following processes occurs during repolarisation of nerve fibre?

  (i) Open \[N{{a}^{+}}\] channel

  (ii) Closed \[N{{a}^{+}}\] channel

  (iii) Closed \[{{K}^{+}}\] channel

  (iv) Open \[{{K}^{+}}\] channel

  A)
  (ii) and (iv)          done clear
  B)
         (i) and (iii) done clear
  C)
  (ii) and (iii)          done clear
  D)
         (i) and (ii) done clear
  View Solution play_arrow

• question_answer114)
  The amount of neurotransmitter released from  presynaptic cell is a function of:
  A)
  The voltage of the individual action potential in the presynaptic neuron. done clear
  B)
  The frequency of arriving action potentials is the presynaptic neuron. done clear
  C)
  Whether the action potential is excitatory or inhibitory. done clear
  D)
  The receptors in the postsynaptic cell. done clear
  View Solution play_arrow

• question_answer115)
  Which is absent in aqueous humor?
  A)
  Carbon dioxide   done clear
  B)
         Oxygen done clear
  C)
  Hyaluronic acid              done clear
  D)
  Glucose done clear
  View Solution play_arrow

• question_answer116)
  Which of the following statement is correct regarding cerebellum of brain?
  A)
  It is concerned with the maintenance of posture/equilibrium. done clear
  B)
  It is responsible for olfactory functions. done clear
  C)
  It controls optic functions. done clear
  D)
  Both [a] and [c] done clear
  View Solution play_arrow

• question_answer117)
  Which is not connected with autonomic system?
  A)
  Memory & learning         done clear
  B)
  Peristalsis done clear
  C)
  Digestion            done clear
  D)
         Excretion done clear
  View Solution play_arrow

• question_answer118)
  In mammalian cochlea, the thin-walled sloping roof of the scala media is referred to as:
  A)
  Organ of Corti done clear
  B)
  Scala tympani done clear
  C)
  Basilar membrane done clear
  D)
  Reissner's membrane done clear
  View Solution play_arrow

• question_answer119)
  Which has H - shaped grey matter?
  A)
  Cerebrum           done clear
  B)
         Medulla oblongata done clear
  C)
  Cerebellum                     done clear
  D)
  Spinal cord done clear
  View Solution play_arrow

• question_answer120)
  The function of cerebrospinal fluid does not include:
  A)
  Protection of delicate brain and spinal cord from shock. done clear
  B)
  Protection of brain and spinal cord by containing antibody. done clear
  C)
  Buoyancy to brain. done clear
  D)
  As a medium for excretion of waste product. done clear
  View Solution play_arrow

• question_answer121)
  The one-way flow of information between presynaptic and postsynaptic cells is characteristic of most kinds of neuron interactions. A notable exception to this rule is the:  
  A)
  Neuromuscular junction done clear
  B)
  Nicotinic receptor system of vertebrate neurons done clear
  C)
  Motor end plate done clear
  D)
  Gap junction done clear
  View Solution play_arrow

• question_answer122)
  Scala vestibuli is connected with:
  A)
  Fenestra rotundus done clear
  B)
        Fenestra ovalis done clear
  C)
  Scala media      done clear
  D)
  Eustachian tube done clear
  View Solution play_arrow

• question_answer123)
  Which of the following functions as a signal filter and relays signals to the appropriate portion of the brain?
  A)
  Thalamus       done clear
  B)
         Hypothalamus done clear
  C)
  Cerebrum       done clear
  D)
         Cerebellum done clear
  View Solution play_arrow

• question_answer124)
  Once the threshold level is reached, ___.
  A)
  The \[N{{a}^{+}}\] gates open.     done clear
  B)
  An action potential will be generated. done clear
  C)
  The membrane is depolarised. done clear
  D)
  The refractory period is over. done clear
  View Solution play_arrow

• question_answer125)
  Sequence of meninges from inner to outside is:
  A)
  Duramater - Arachnoid - Piamater done clear
  B)
  Duramater - Piamater - Arachnoid done clear
  C)
  Arachnoid - Duramater - Piamater done clear
  D)
  Piamater - Arachnoid - DuramaterI done clear
  View Solution play_arrow