Question

The first heart sound is
a)"Lub" sound at the end of systole
b)"Dub" sound at the end of systole
c)"Lub" sound at the beginning of systole
d)"Dub" sound at the beginning of systole
please answer this question ​

Answer 1

Answer:

"Lub" sound at the beginning of systole (c)

Explanation:

Hope you received the answer which you needed pls follow me and mark my answer as brainliest answer..

Answer 2

Answer:

The “ lub” is the first heart sound, commonly termed S1, and is caused by turbulence caused by the closure of mitral and tricuspid valves at the start of systole. The second sound,” dub” or S2, is caused by the closure of aortic and pulmonic valves, marking the end of systole.

therefore answer is,

c)"Lub" sound at the beginning of systole