As a physician listens to the heart of a human patient,he hears an an atypical "lub" sound.Which part of the heart might be malfunctioning?
A)the AV valve
B)the semiliunar valves
C)the right atrium
D)the right ventricle

Question

Quizplus · Accepted Answer

The "lub" sound is normally produced by the closure of the heart valves, specifically the AV valve and the semilunar valve. An atypical "lub" sound suggests that one of these valves is not functioning properly. As the AV valve is responsible for controlling blood flow between the atrium and ventricle on each side of the heart, a malfunction in this valve could lead to an abnormal "lub" sound.

As a Physician Listens to the Heart of a Human