Normal heart sounds are produced by the slamming shut of the AV valves at the end of diastole and 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, specifically the AV valves (tricuspid and mitral valves) at the end of diastole (when the heart is relaxed and filling with blood) and the aortic and pulmonary valves at the end of systole (when the heart is contracting and pumping blood out). These sounds can be heard with a stethoscope and are known as the "lub-dub" sound of the heartbeat.

Normal Heart Sounds Are Produced by the Slamming Shut of the AV