NEET 2026 Biology question

Muscle contraction is initiated by a signal sent by the central nervous system by the release of .

(1)acetyl cholineCorrect
(2)acetyl coenzyme A
(3)cyclic guanine monophosphate
(4)cyclic adenine monophosphate

Answer: (1)

Solution

Muscle contraction starts when a motor neuron releases the neurotransmitter acetylcholine at the neuromuscular junction. This depolarises the sarcolemma, and the action potential triggers release of Ca2+ from the

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Question ID VK-105138