Question

What happens during S1 sound? During S2 sound?

A) Closure of aortic and pulmonary valves; closure of mitral and tricuspid valves
B) Closure of mitral and tricuspid valves; closure of aortic and pulmonary valves
C) Opening of aortic and pulmonary valves; closure of mitral and tricuspid valves
D) Opening of mitral and tricuspid valves; closure of aortic and pulmonary valve

Answer 1

The S1 sound is created by the b. closure of the mitral and tricuspid valves, while the S2 sound is created by the closure of the aortic and pulmonary valves in a normal, healthy heart.

Step-by-step explanation:

In a normal, healthy heart, the b. closure of the mitral and tricuspid valves creates the S1 sound. This sound occurs during ventricular contraction and is often described as a 'lub' or first heart sound.

On the other hand, the closure of the aortic and pulmonary valves creates the S2 sound. This sound occurs during ventricular diastole and is often described as a 'dub' or second heart sound.