An athlete has a resting cardiac output of 5000 cm³ per minute and a heart rate of 50 beats per minute. What is the stroke volume?
Answer and explanation
Correct answer: A. 100 cm³
- Step 1: Cardiac output = heart rate × stroke volume.
- Step 2: Stroke volume = 5000 ÷ 50 = 100 cm³.
Answer
100 cm³.
Why not the others: 250 000 cm³: this multiplies instead of dividing. 5050 cm³: the cardiac output and heart rate were added. 50 cm³: this is the heart rate.
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