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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 andnot by axon endings

D

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

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The correct Answer is:
D
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