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

Question

Quizplus · Accepted Answer

When the semilunar valves are open, blood is being ejected from the ventricles into the pulmonary arteries and aorta, meaning the ventricles are in systole. The AV valves are closed at this point to prevent backflow into the atria. The ventricles being in diastole would indicate that the heart is in a period of relaxation and the semilunar valves would not be open.

Which of the Events Below Does NOT Occur When the Semilunar