__________ plays a critical role as a neurotransmitter that stimulates muscles to contract.
A) Acetylcholine
B) GABA
C) Dopamine
D) Endorphin

Question

Quizplus · Accepted Answer

Acetylcholine is a neurotransmitter that plays a critical role in stimulating muscles to contract. It is released from motor neurons at the neuromuscular junction and binds to receptors on muscle cells, causing them to depolarize and contract.

__________ Plays a Critical Role as a Neurotransmitter That Stimulates