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Question
Unidirectional transmission of a nerve impulse through nerve fibre is due to the fact that
Options:
A .  Neurotransmitters are released by dendrites and not by axon endings
B .  Sodium pump starts operating only at the cyton and then continues into the nerve fibre
C .  Neurotransmitters are released by the axon endings and not by dendrites
D .  Nerve fibre is insulated by a medullary sheath
Answer: Option C
:
C
The transmissionof theimpulse occurs via release, diffusion, receptor binding of neurotransmitter molecules andunidirectionalcommunication between neurons. Neurotransmitters are released at axon terminals.The axons transmit nerve impulses away from thecell body to a synapse or to a neuro-muscular junction.

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