Which of the following is an excitatory neurotransmitter secreted by motor neurons innervating skeletal muscle?
A) acetylcholine
B) cholinesterase
C) gamma aminobutyric acid
D) norepinephrine

Question

Quizplus · Accepted Answer

Acetylcholine is the main neurotransmitter secreted by motor neurons that activates skeletal muscle contraction. Cholinesterase is an enzyme that breaks down acetylcholine. Gamma aminobutyric acid (GABA) is an inhibitory neurotransmitter, and norepinephrine is secreted by sympathetic neurons to stimulate the fight or flight response.

Which of the Following Is an Excitatory Neurotransmitter Secreted by Motor