A class of preganglionic fibers present in both sympathetic and parasympathetic divisions.
A) postganglionic neuron
B) adrenergic
C) medulla
D) cholinergic
E) none of the above

Question

Quizplus · Accepted Answer

The class of preganglionic fibers present in both sympathetic and parasympathetic divisions are cholinergic fibers. This is because preganglionic fibers release acetylcholine, which is a neurotransmitter that activates nicotinic receptors on the postganglionic neuron. The postganglionic neuron then releases either norepinephrine (in sympathetic division) or acetylcholine (in parasympathetic division). Therefore, option D (cholinergic) is the correct answer.

A Class of Preganglionic Fibers Present in Both Sympathetic and Parasympathetic