Normal heart sounds are produced by vibrations caused by the closing of the AV valves at the end of diastole and the closing of the aortic and pulmonary valves at the end of systole.

Question

Quizplus · Accepted Answer

This statement is true. Normal heart sounds are produced by the closing of the heart valves as blood flows through different chambers of the heart during its pumping cycle. The first heart sound (S1) is caused by the closure of the mitral and tricuspid valves at the beginning of systole, while the second heart sound (S2) is produced by the closure of the aortic and pulmonary valves at the end of systole.

Normal Heart Sounds Are Produced by Vibrations Caused by the Closing