Predict the position of the valves during the ventricular ejection phase.
A)The AV valves are forced open while both semilunar valves are shut.
B)The AV valves and semilunar valves are shut.
C)The AV valves and semilunar valves are forced open.
D)The AV valves are shut while both semilunar valves are forced open.

Question

Quizplus · Accepted Answer

During the ventricular ejection phase, the ventricles contract and both the semilunar valves are forced open, allowing blood to be ejected into the pulmonary artery and aorta. At the same time, the AV valves are closed to prevent backflow of blood into the atria. Therefore, the best choice is D, which states that the AV valves are shut while both semilunar valves are forced open.

Predict the Position of the Valves During the Ventricular Ejection