Erection occurs when
A)the spongy erectile tissue of the penis becomes engorged with blood.
B)the veins flowing out of the penis vasoconstrict.
C)the arteries of the penis vasodilate.
D)nitric oxide is releaseD.
E)All of these events occur to promote an erection.

Question

Quizplus · Accepted Answer

All of these events occur to promote an erection. The spongy erectile tissue of the penis becomes engorged with blood due to vasodilation of the arteries and vasoconstriction of the veins, and this process is mediated by the release of nitric oxide.

Erection Occurs When