Question

sympathetic postganglionic neurotransmitte
what neurotransmitter is released by sympathetic postganglionic neurons?
serotonin
acetylcholine
norepinephrine
dopamine

Explanation:

Sympathetic postganglionic neurons (except those innervating sweat glands and some blood vessels) release norepinephrine. Serotonin is not the main neurotransmitter here. Acetylcholine is mainly released by parasympathetic postganglionic neurons (and sympathetic preganglionic neurons). Dopamine is not the primary neurotransmitter for most sympathetic postganglionic neuron - target interactions.

Answer:

Norepinephrine