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Q.

In a person, the volume of blood at the end of ventricular systole is 60mL, and the volume of blood at the end of ventricular diastole is 110mL. His heart rate is 80 beats per minute. Calculate the cardiac output.

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a

5 litres 

b

3.5 litres 

c

4 litres  

d

5600 mL

answer is A.

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Detailed Solution

Stroke volume = EDV – ESV 
= 110 ml – 60 ml = 50 mL
Cardiac output = Rate of heart/minute×  SV 
 =80×50=4000 mL/4L

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