Question

The neurotransmitter of a majority of post-ganglionic sympathetic fibers is

	a.	Dopamine
	b.	Acetylcholine
	c.	Glycine
	d.	Epinephrine
	e.	all of the above
	f.	none of the above

Answer 1

ans) none of the above

Postganglionic fibers in the sympathetic division use norepinephrine (also called noradrenalin) as a neurotransmitter. Postganglionic fibers in the parasympathetic division use acetylcholine as a neurotransmitter.

Postganglionic neurons are a group of neurons that present in ANS connecting ganglia to the target tissue. Postganglionic fibers in the sympathetic division are adrenergic and in the parasympathetic division are cholinergic.

The preganglionic neurons are arising directly from the CNS and preganglionic fibers in both sympathetic and parasympathetic division are cholinergic and release acetylcholine as neurotransmitter.