NEET Zoology Heart & Circulation MCQ Question
If the heart rate increases from 72 beats per minute to 90 beats per minute while maintaining a constant stroke volume of 70 mL, what will be the new cardiac output?
5 liters per minute
5.4 liters per minute
6.3 liters per minute
7.0 liters per minute
Correct Answer
Detailed Explanation
Cardiac output is calculated as the product of heart rate and stroke volume. With a heart rate of 90 beats per minute and stroke volume of 70 mL, the cardiac output is 90 x 70 = 6300 mL or 6.3 liters per minute.
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