Which of the Following is a Sympathetic Neurotransmitter Used for Vasodilation

Question

Which of the following is a sympathetic neurotransmitter used for vasodilation?
A) acetylcholine
B) norepinephrine
C) dopamine
D) serotonin
E) nitric oxide

Accepted Answer

Nitric oxide is a sympathetic neurotransmitter that causes vasodilation, which is the widening of blood vessels. It is produced by endothelial cells in response to sympathetic stimulation and causes relaxation of smooth muscle cells in the blood vessels, leading to increased blood flow. Acetylcholine is a neurotransmitter that is primarily responsible for vasodilation in the parasympathetic nervous system. Norepinephrine, dopamine, and serotonin are all neurotransmitters that cause vasoconstriction.