Question

which neurotransmitter triggers skeletal muscles to contract?
dopamine
acetylcholine
endorphin
serotonin

Explanation:

Dopamine is for reward/movement regulation, Endorphin for pain relief, Serotonin for mood. Acetylcholine is the neurotransmitter that triggers skeletal muscle contraction at neuromuscular junctions.

Answer:

B. Acetylcholine