Question

What is the role of acetylcholine in muscle contraction?

Answer 1

Acetylcholine is the chemical signal the nerve sends to the muscle to cause contraction.

Answer 2

OR
Acetylcholine is a neurotransmitter that stimulates muscle contraction at the neuromuscular junction.
It does this by allowing Ca(2+) into the muscle cell.
Thus acetylcholinesterase allows for the contraction to stop.

Answer 3

Acetylecholine is a neurotransmitter secreted by nerves and it interacts with is receptors located on the muscle. that interaction lead to the contraction of muscles.after a specific time ,acetylcolineasterase destroy the acetylcholine after specific time to inhibit muscle movement .if acetylcolineasterase fails to destroy acetylcholine ,muscle continue to move leading to a pathological state called "Epilipsy"