The sympathetic postganglionic fibers that innervate the sweat glands secrete acetylcholine rather than norepinephrine.

Question

Quizplus · Accepted Answer

This is true. The sympathetic postganglionic fibers that innervate sweat glands release acetylcholine, which then binds to muscarinic receptors on the sweat gland cells to stimulate sweat production. Norepinephrine is the primary neurotransmitter released by most other sympathetic postganglionic fibers.

The Sympathetic Postganglionic Fibers That Innervate the Sweat Glands Secrete