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Unidirectional transmission of a nerve i...

Unidirectional transmission of a 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

Verified by Experts

The correct Answer is:
D
Transmission of nerve impulse is unidirectional i.e. only synaptic and bulbs of pre – synaptic neuron can release neurotransmitter and only the post – synaptic neuron membrane has the receptor proteins that can recognize and bind that neurotransmitter. As a result action potential move in one direction.
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