Question

The heart sound heard on the stethoscope when blood pressure in artery is maximum is due to : 1)Closure of semilunar valves 2)Closure of atrio-ventricular valves 3)Opening of atrio-ventricular valves 4)Opening of semilunar valves

Answer 1

Answer:

A option is the answer of this question Please mark the answer as the branliest

Answer 2

Answer:

2 option is correct

Explanation:

Due to closure of the atrioventricular (mitral and tricuspid) valves as the ventricular pressures exceed atrial pressures at the beginning of systole