Which of the following happens during ventricular diastole?

Question

Quizplus · Accepted Answer

During ventricular diastole the ventricles repolarize and relax. The elastic fibers in the ventricle walls return the ventricles to shape, increasing the volume and decreasing the pressure in the ventricles. The pressure inside the now-full atria is greater than inside the relaxed ventricles, so blood moves through the AV valves from the atria to the ventricles. The pressure is also greater in the pulmonary trunk and aorta than inside the ventricles, but blood is caught in the cup-shaped semilunar pulmonary and aortic valves as it tries to return from these vessels to the ventricles. Once filled with blood, these valves are tightly closed to prevent backflow to the ventricles from the pulmonary trunk and aorta. Blood traveling passively from the atria to the ventricles in this phase reduces the pressure in the atria, so blood also moves passively from the vena cavae and pulmonary veins to the atria, too. All four chambers fill with blood during ventricular diastole.

Which of the Following Happens During Ventricular Diastole