Which of the Following Always Occurs During an Erection

Question

Which of the following always occurs during an erection?
A) Ejaculation
B) Secretion of testosterone
C) Spermatogenesis
D) Engorgement of the erectile tissue of the penis with blood

Accepted Answer

An erection is the result of engorgement of the erectile tissue of the penis with blood, which causes it to become rigid and erect. Ejaculation, secretion of testosterone, and spermatogenesis can occur during sexual activity but are not necessarily always present during an erection.