ReNEET 2026 · Biology · Q152Locomotion and MovementIn our bank: Strong match · 87%
Muscle contraction is initiated by a signal sent by the central nervous system by the release of _____.
- A.acetyl choline✓
- B.acetyl coenzyme A
- C.cyclic guanine monophosphate
- D.cyclic adenine monophosphate
Correct Answer
(A) acetyl choline
Solution & Explanation
A motor neuron carries the signal from the CNS to the neuromuscular junction (motor end plate), where it releases the neurotransmitter acetylcholine. This generates an action potential in the sarcolemma, initiating contraction.
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