Which of the Events Below Does NOT Occur When the Semilunar

Question

Which of the events below does NOT occur when the semilunar valves are open?
A) blood enters the pulmonary artery and aorta
B) ventricles are in diastole
C) AV valves are closed
D) ventricles are in systole

Accepted Answer

When the semilunar valves are open, blood enters the pulmonary artery and aorta (A), the AV valves are closed (C), and the ventricles are in systole (D). Option B is incorrect because the ventricles are actually in systole when the semilunar valves are open, not in diastole.