Q:

When listening to the “lub-dup” sound of the heart with a stethoscope, what is the cause of the “dup” sound?

waelhammad
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2022-10-18
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When listening to the “lub-dup” sound of the heart with a stethoscope, what is the cause of the “dup” sound?

  1. The blood flowing through the open semilunar valves
  2. The blood flowing through the open atrioventricular valves
  3. The turbulent blood flow through closing atrioventricular valves
  4. The turbulent blood flow through closing semilunar valves
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waelhammad
2022-10-18
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D: Turbulent blood flow generates audible sound that can be heard with a stethoscope placed on the skin above the heart. Such turbulent flow is produced when blood flow out of the heart is impeded by the cusps of the semilunar valves as they close.

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