Which valve(s) prevent(s) regurgitation of blood from a ventricle to an atrium?

Question

Quizplus · Accepted Answer

The tricuspid valve prevents regurgitation of blood from the right ventricle to the right atrium, while the mitral valve prevents regurgitation of blood from the left ventricle to the left atrium. Therefore, both a (tricuspid) and b (mitral) are correct. The pulmonary valve prevents backflow of blood from the pulmonary artery to the right ventricle, while the aortic valve prevents backflow of blood from the aorta to the left ventricle, but neither of these valves prevent regurgitation of blood from a ventricle to an atrium. Therefore, options c and e are incorrect.

Which Valve(s) Prevent(s) Regurgitation of Blood from a Ventricle to an Atrium