NEET2019ZoologyBody Fluids and CirculationActual
What would be the heart rate of a person if the cardiac output is 5 L, blood volume in the ventricles at the end of diastole is 100 mL and at the end of ventricular systole is 50 mL?
Options
- A50 beats per minute
- B75 beats per minute
- C100 beats per minute
- D125 beats per minute
Correct answer
C. 100 beats per minute
Step-by-step solution
CO = HR X (EDV-ESV) (Cardiac Output = Heart rate x stroke volume; stroke volume = End Diastole volume - End Systole volume); We have, CO = 5 Liters,5000ml EDV = 100ml ESV =50 ml Hence, CO = HR x (EDV - ESV) HR = CO / (EDV - ESV) HR = 5000 / (100-50) = 5000 /50 HR = 100 bpm