During the ventricular systole,the AV valves _______ and the semilunar valves _____.

Question

Quizplus · Accepted Answer

During ventricular systole, the ventricles contract and push blood out of the heart. This causes the pressure in the ventricles to increase above the pressure in the atria, which forces the AV valves (tricuspid and mitral valves) to close to prevent backflow of blood into the atria. At the same time, the pressure in the ventricles opens the semilunar valves (aortic and pulmonary valves), allowing the blood to be ejected into the aorta and pulmonary artery respectively. Therefore, the AV valves close and the semilunar valves open during ventricular systole, making option A the correct answer.

During the Ventricular Systole,the AV Valves _______ and the Semilunar