During ventricular systole
A) only the AV valves open.
B) only the AV valves close.
C) only the semilunar valves close.
D) the semilunar valves close and the AV valves open.
E) the semilunar valves open and the AV valves close.

Question

Quizplus · Accepted Answer

During ventricular systole, the ventricles contract, causing the atrioventricular (AV) valves to close to prevent backflow of blood into the atria, and the semilunar valves to open, allowing blood to be ejected into the aorta and pulmonary artery.

During Ventricular Systole