Which of the events below does not occur when the semilunar valves are open?

Question

Quizplus · Accepted Answer

When the semilunar valves are open, blood is being ejected from the ventricles into the pulmonary artery and aorta, meaning ventricles are in systole. In order for blood to enter these arteries, the AV valves must be closed to prevent backflow. However, the semilunar valves being open does not indicate anything about the state of the ventricles in diastole, so choice C is not correct.

Which of the Events Below Does Not Occur When the Semilunar