Question

In a cardiac output of 5250 mL per minute, with 75 heartbeats per minute, the stroke volume is

• A. 60 mL
• B. 80 mL
• C. 55 mL
• D. 70 mL

Answer 1

The correct option is D 70 mL

Cardiac Output = Heart Rate X Stroke Volume

5250 ml = 75 beats/min X X ml

So, Stroke volume = 70 mL.

The more cardiac muscle stretches, the more forcefully it contracts.

Thus, the correct answer is '70 mL.'