Parasympathetic stimulation is required for erection, whereas sympathetic stimulation is necessary for ejaculation.

Question

Quizplus · Accepted Answer

Parasympathetic nerve fibers release nitric oxide, which leads to smooth muscle relaxation in the penis and allows blood flow, resulting in an erection. On the other hand, sympathetic nerve fibers cause rhythmic contractions of the muscles surrounding the reproductive organs, allowing for ejaculation.

Parasympathetic Stimulation Is Required for Erection, Whereas Sympathetic Stimulation Is