Which of the following statements are incorrect? |
(i) When an impulse travels along a myelin sheath neuron, it leaps over the myelin sheath from one node to the next. |
(ii) At chemical synapse there is continuity between the presynaptic and postsynaptic neurons provided by the gap junctions. |
(iii) Neurotransmitters are chemicals that are released from postsynaptic neuron which interact with specific receptors of presynaptic neuron. |
(iv) Neurons releasing acetylcholine are described as cholinergic neurons and those releasing noradrenaline are described as adrenergic neurons. |
(v) Refractory period is the period after the transmission of an impulse in a nerve fibre in which membrane of the axon regains its ability to transmit impulses. |
A) (i), (ii) and (v)
B) (ii) and (iv)
C) (ii) and (iii)
D) (i), (iii) and (v)
Correct Answer: C
You need to login to perform this action.
You will be redirected in
3 sec