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The amount of blood the heart pumps per minute, known as cardiac output, is determined by multiplying the heart rate (HR) by the stroke volume (SV), which represents the blood ejected by the ventricle in one beat. If HR is 100 beats per minute and SV is 50 ml, what is the cardiac output?

  1. 5000 ml
  2. 100 ml
  3. 50 ml
  4. 1000 ml

Correct answer: 5000 ml

Solution

Cardiac output is found by multiplying heart rate by stroke volume. With 100 beats per minute and 50 mL per beat, the result is 5000 mL per minute.

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