GROSS ANATOMY

GROSS ANATOMY

AUTONOMIC NERVOUS SYSTEM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
This neurotransmitter is released by all preganglionic neurons in both the sympathetic and parasympathetic divisions, among other places in the body:
A
acetylcholine
B
adrenaline
C
serotonin
D
calcium
Explanation: 

Detailed explanation-1: -The neurotransmitters involved in the ANS are acetylcholine, norepinephrine, and epinephrine. Preganglionic neurons of the sympathetic and parasympathetic divisions and postganglionic neurons of the parasympathetic nervous system utilize acetylcholine (ACh).

Detailed explanation-2: -The main neurotransmitter in both the sympathetic and parasympathetic nervous systems at the preganglionic fiber, as it contacts the postganglionic fiber, is acetylcholine. The same is also true at the postganglionic fiber as it contacts the effector organ generally.

Detailed explanation-3: -The Sympathetic Fibers At the synapses within the ganglia, the preganglionic neurons release acetylcholine, a neurotransmitter that activates nicotinic acetylcholine receptors on postganglionic neurons.

Detailed explanation-4: -Nerve fibers that release acetylcholine are referred to as cholinergic fibers. These include all preganglionic fibers of the ANS, both sympathetic and parasympathetic systems; all postganglionic fibers of the parasympathetic system; and sympathetic postganglionic fibers innervating sweat glands.

Detailed explanation-5: -Both the sympathetic and parasympathetic nerves release neurotransmitters, primarily norepinephrine and epinephrine for the sympathetic nervous system, and acetylcholine for the parasympathetic nervous system.

There is 1 question to complete.