When listening to the “lub-dup” sound of the heart with a stethoscope, what is the cause of the “dup” sound? A. The blood flowing through the open semilunar valves B. The blood flowing through the open atrioventricular valves C. The turbulent blood flow through closing atrioventricular valves D. The turbulent blood flow through closing semilunar valves
Option D. Turbulent blood go with the flow generates audible sound that may be heard with a stethoscope placed at the skin above the heart. Such turbulent go with the flow is produced when blood go with the flow out of the heart is impeded with the aid of using the cusps of the semi- lunar valves as they close.
