Question

question 4 (multiple choice worth 2 points) (04.03r mc) if a patient is experiencing a heart murmur during s1, what could be the underlying cause? the valve between the atria and the ventricles is not working properly. the valve between the heart and the pulmonary artery is not working properly. the atria and the ventricles are not filtering blood properly. the heart and the pulmonary artery are not filtering blood properly.

Explanation:

S1 heart sound is produced by the closure of the atrioventricular (AV) valves (mitral and tricuspid) as the ventricles contract. A murmur during S1 suggests an issue with these AV valves (the valves between atria and ventricles) not working properly, like regurgitation or stenosis affecting their closure. The other options: the valve between heart and pulmonary artery is related to S2 (pulmonary valve closure), atria/ventricles don't "filter" blood, and heart - pulmonary artery filtering isn't a relevant concept here.

Answer:

A. The valve between the atria and the ventricles is not working properly.