STANDARDZoology-Neural Control and Coordination
STANDARD Zoology Nerve Impulse Transmission MCQ Question
Type: MCQ-conceptual-Medium-Class 11
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 axon endings and not by dendrites
Correct Answer
Option D
Detailed Explanation
The unidirectional transmission of nerve impulses is due to neurotransmitters being released by axon endings, which then bind to receptors on the next neuron, ensuring the impulse travels in one direction.
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