Sympathetic dominance would be most likely responsible for erection.

Question

Quizplus · Accepted Answer

Erection is actually controlled by parasympathetic nervous system, not sympathetic nervous system. Parasympathetic dominance causes relaxation of smooth muscles in the penis and dilation of blood vessels, leading to increased blood flow and erection. On the other hand, sympathetic nervous system causes ejaculation and detumescence of the penis, opposite to erection.

Sympathetic Dominance Would Be Most Likely Responsible for Erection