During ventricular contraction
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 contraction, the semilunar valves open to allow blood to be ejected into the arteries, and the AV valves close to prevent backflow into the atria.

During Ventricular Contraction