Do Cholinergic Fibers Release Norepinephrine?

Both sympathetic and parasympathetic preganglionic neurons are cholinergic, meaning they release acetylcholine (Ach) at the synapse in the ganglion. ... In the adrenergic synapse, released norepinephrine is either reabsorbed into the preganglionic neuron or degraded by catechol-o-methyl transferase (COMT) enzyme.

What fibers release norepinephrine?

The postganglionic sympathetic fiber releases norepinephrine, whereas the postganglionic parasympathetic fiber releases acetylcholine.

What do cholinergic fibers release?

Nerve fibers that release acetylcholine are referred to as cholinergic fibers. ... Nerve fibers that release norepinephrine are referred to as adrenergic fibers. Most sympathetic postganglionic fibers release norepinephrine.