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Unidirectional transmission of nerve imp...

Unidirectional transmission of nerve impulse through nerve fibre is due to the fact that

A

nerve fibre is insulated by a medullary sheath

B

sodium pump starts operating only at the cyton and then continues into the nerve fibre

C

neurotransmitters are released by dendrites and not by axon endings

D

neurotransmitters are released by the axon endings and not by dendrites.

Text Solution

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The correct Answer is:
D
A nerve impulse is transmitted from one neuron to another with the help of chemicals called neurotransmitters that are released by the axon endings formed by the membrane of a pre-synaptic neuron (axon ending part) and a post-synaptic neuron which may or may not be separated by synaptic cleft.
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