A person’s cardiac output is 5.6 L/min and heart rate is 80 beats per minute. What is the stroke volume?
Correct answer D. 70 mL
Explanation
Stroke volume = cardiac output ÷ heart rate = 5600 mL/min ÷ 80 min⁻¹ = 70 mL per beat. Multiplying instead of dividing gives 448 mL.
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