Which of the following correctly describes an erection?
A)Smooth muscles of vascular spaces in the penis contract.
B)Parasympathetic impulses constrict arteries leading to the penis.
C)Parasympathetic neurons release nitric oxide causing dilation of small arteries in the penis.
D)The spongy tissue in the penis fills with air.

Question

Quizplus · Accepted Answer

A parasympathetic response causes the release of nitric oxide, which triggers the relaxation of smooth muscles in the arteries leading to the penis. This dilation allows blood to flow into the spongy tissue of the penis, resulting in an erection.

Therefore, option C is the correct answer.

Which of the Following Correctly Describes an Erection