Question

acetylcholine is the main neurotransmitter released by
multiple choice
preganglionic sympathetic neurons and cells of the adrenal medulla.
cells of the adrenal medulla and postganglionic parasympathetic neurons.
motor neurons and postganglionic sympathetic neurons.
preganglionic sympathetic neurons and postganglionic sympathetic neurons.
preganglionic sympathetic neurons and motor neurons.

Explanation:

Acetylcholine is released by preganglionic sympathetic neurons. It is also the neurotransmitter released by motor neurons at the neuromuscular junction. Cells of the adrenal medulla release catecholamines like epinephrine. Post - ganglionic sympathetic neurons mainly release norepinephrine. Post - ganglionic parasympathetic neurons release acetylcholine but that's not the full answer here. The main releasers relevant to the options are preganglionic sympathetic neurons and motor neurons.

Answer:

preganglionic sympathetic neurons and motor neurons