If the Beating Heart Makes a "Lub-Dup" Sound, the "Dup

question 32

Multiple Choice

If the beating heart makes a "lub-dup" sound, the "dup" sound is caused by

• A) the apex of the heart hitting the anterior chest wall.
• B) a stenotic atrioventricular valve.
• C) the large force of the contracting ventricles.
• D) vibrations that result from the semilunar valves slamming shut.

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