Free Ncert Solutions for 11th Class Biology Neural Control and Coordination

Briefly describe the structure of the following (a) Brain (b) Eye (c) Ear

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Compare the following (a) Central Neural System (CNS) and Peripheral Neural System (PNS) (b) Resting potential and action potential (c) Choroid and retina

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3)

Explain the following processes (a) Polarisation of the membrane of a nerve fibre (b) Depplarisation of the membrane of a nerve fibre (c) Conduction of a nerve impulse along a nerve fibre (d) Transmission of a nerve impulse across a chemical synapse

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4)

Draw labelled diagrams of the following (a) Neuron (b) Brain (c) Eye (d) Ear

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5)

Write short notes on the following (a) Neural coordination (b) Forebrain (c) Midbrain (d) Hindbrain (e) Retina (f) Ear ossicles (g) Cochlea (h) Organ of Corti (i) Synapse

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6)

Give a brief account of (a) Mechanism of synaptic transmission (b) Mechanism of vision (c) Mechanism of hearing

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7)

Answer briefly (a) How do you perceive the colour of an object? (b) Which part of our body helps us in maintaining the body balance? (c) How does the eye regulate the amount of light that falls on the retina?

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8)

Explain the following (a) Role of Na+ in the generation of action potential. (b) Mechanism of generation of light-induced impulse in the retina. (c) Mechanism through which a sound produces a nerve impulse in the inner ear.

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9)

Differentiate between (a) Myelinated and non-myelinated axons (b) Dendrites and axons (c) Rods and cones (d) Thalamus and hypothalamus (e) Cerebrum and cerebellum

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10)

Answer the following (a) Which part of the ear determines the pitch of a sound? (b) Which part of the human brain is the most developed? (c) Which part of our central neural system acts as a master clock?

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11)

The region of the vertebrate eye, where the optic nerve passes out of the retina, is called the (a) fovea (b) iris (c) blind spot (d) optic chaisma

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12)

Distinguish between (a) afferent neurons and efferent neurons (b) impulse conduction in a myelinated nerve fibre and unmyelinated nerve fibre (c) aqueous humour and vitreous humour (d) blind spot and yellow spot (e) cranial nerves and spinal nerves

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13) Chemicals which are released at the synaptic junction are called (a) hormones (b) neurotransmitters (c) cerebrospinal fluid (d) lymph

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14) Potential difference across resting membrane is negatively charged. This is due to differential distribution of the following ions. (a) and ions (b) and ions (c) and ions (d) and ions

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15) Resting membrane potential is maintained by (a) hormones (b) neurotransmitters (c) ion pumps (d) None of these

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16) The function of our visceral organs is controlled by (a) sympathetic and somatic neural system (b) sympathetic and parasympathetic neural system (c) central and somatic nervous system (d) None of the above

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17) Which of the following is not involved in knee-jerk reflex? (a) Muscle spindle (b) Motor neuron (c) Brain (d) Inter neurons

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18) An area in the brain which is associated with strong emotions is (a) cerebral cortex (b) cerebellum (c) limbic system (d) medulla

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19) Mark the vitamin present in rhodopsin (a) vit-A (b)vit-B (c) vit-C (d) vit-D

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20) Human eyeball consists of three layers and it encloses (a) lens, iris, optic nerve (b) lens, aqueous humor and vitreous humor (c) cornea, lens, iris (d) cornea, lens, optic nerve

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21) Wax gland present in the ear canal is called (a) sweat gland (b) prostate gland (c) Cowper's gland (d) sebaceous gland/ceruminous gland

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22) The part of internal ear responsible for hearing is (a) cochlea (b) semicircular canal (c) utriculus (d) sacculus

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23) The organ of corti is a structure present in (a) external ear (b) middle ear (c) semi circular canal (d) cochlea

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24) Rearrange the following in the correct order of involvement in electrical impulse movement.

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25) Comment upon the role of ear in maintaining the balance of the body and posture.

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26) Which cells of the retina enable us to see coloured objects around us?

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27) Arrange the following in the order of reception and transmission of sound wave from the ear drum Cochlear nerve, external auditory canal, ear drum, stapes, incus, malleus, cochlea.

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28) During resting potential, the axonal membrane is polarised, indicate the movement of +ve and -ve ions leading to polarisation dia grammatically.

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29) Name the structures involved in the protection of the brain.

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30) Our reaction like aggressive behaviour, use of abusive words, restlessness etc. are regulated by brain, name the parts involved.

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31) What do grey and white matter in the brain represent?

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32) Where is the hunger centre Located in human brain?

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33) While travelling at a higher altitude, a person complains of dizziness and vomiting sensation. Which part of the inner ear is disturbed during the journey?

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34) Complete the statement by choosing appropriate match among the following.

Column I Column II

A. Resting potential 1. Chemicals involved in the transmission of impulses at synapses.

B. Nerve impulse 2. Gap between the pre synaptic and post synaptic neurons.

C. Synaptic cleft 3. Electrical potential difference across the resting neural membrane.

D. Neurotransmitters 4.An electrical wave like response of a neuron to a stimulation.

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35) The major parts of the human neural system is depicted below. Fill in the empty boxes with appropriate words.

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36) What is the difference between electrical transmission and chemical transmission?

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37) Neuron system and computers share certain common features. Comment in five lines.

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38) If someone receives a blow on the back of neck, what would be the effect on the person's CNS?

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39) What is the function described to Eustachian tube?

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40) Label the following parts in the given diagram using arrow. (a) Aqueous chamber (b) Cornea (c) Lens (d) Retina (e) Vitreous chamber (f) Blind spot

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41) Explain the process of the transport and release of a neurotransmitter with the help of a labelled diagram showing a complete neuron, axon terminal and synapse.

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42) Name the parts of human forebrain indicating their respective functions.

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43) Explain the structure of middle and internal ear with the help of diagram.

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Column I	Column II
A. Resting potential	1. Chemicals involved in the transmission of impulses at synapses.
B. Nerve impulse	2. Gap between the pre synaptic and post synaptic neurons.
C. Synaptic cleft	3. Electrical potential difference across the resting neural membrane.
D. Neurotransmitters	4.An electrical wave like response of a neuron to a stimulation.

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11th Biology Neural Control and Coordination