Question

multiple cholce question
the neurotransmitter ______ stimulates muscle contractions.
serotonin
dopamine
gamma - aminobutyric acid
acetylcholine

Explanation:

Acetylcholine is a neurotransmitter that is released at the neuromuscular junction. It binds to receptors on muscle cells, which leads to an influx of ions and ultimately muscle contraction. Serotonin is involved in mood regulation, dopamine in reward - related and motor functions (but not the direct stimulation of muscle contraction as its main role), and gamma - aminobutyric acid (GABA) is an inhibitory neurotransmitter.

Answer:

acetylcholine