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Biology · PYQ NEET UG 2026

हिन्दी

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

  1. acetyl choline
  2. acetyl coenzyme A
  3. cyclic guanine monophosphate
  4. cyclic adenine monophosphate

Correct answer · Option 1

acetyl choline

Explanation

A neural signal reaching the neuromuscular junction releases a neurotransmitter (acetyl choline) which generates an action potential in the sarcolemma.
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