For erection to occur
A) there must be sufficient blood hydrostatic pressure.
B) the sacral spinal cord must be intact.
C) nitric oxide must be present.
D) all of the above
E) none of the above

Question

Quizplus · Accepted Answer

For an erection to occur, there must be sufficient blood hydrostatic pressure, which is necessary for engorgement of the penis. The sacral spinal cord must also be intact, as it plays a role in activating the nerves responsible for penile engorgement. Additionally, nitric oxide is necessary for the relaxation of smooth muscle in the penis, which facilitates blood flow and engorgement. Therefore, all of the above options are required for an erection to occur.

For Erection to Occur