What is a function of the nitric oxide released by parasympathetic nerves during erection?
A) It causes relaxation of the smooth muscle in the walls of arterioles supplying the penis.
B) It restricts the amount of blood entering the blood sinuses of the erectile tissue.
C) It causes the dilation of the veins that drain the penis to increase the blood outflow.
D) It facilitates the inactivation of mechanoreceptors in the spinal cord.
E) It inhibits secretion of mucus for penile lubrication by the bulbourethral glands.

Question

Quizplus · Accepted Answer

Nitric oxide released by parasympathetic nerves during erection causes relaxation of the smooth muscle in the walls of arterioles supplying the penis. This leads to vasodilation and increased blood flow to the erectile tissue, resulting in an erection.

What Is a Function of the Nitric Oxide Released by Parasympathetic