Q77 / 200 · MHT CET - Medical 2026 (21 April Shift 1) · Biology
Calculate the heart rate per minute if the stroke volume is 70 ml and cardiac output of heart is 5250 ml/min.
- A85
- B72
- Correct answerC75
- D80
Solution
Cardiac output is the volume of blood pumped by each ventricle per minute.
$\text{Cardiac output} = \text{Stroke volume} \times \text{Heart rate}$
Given:
$\text{Cardiac output} = 5250 \text{ ml/min}$
$\text{Stroke volume} = 70 \text{ ml}$
$\text{Heart rate} = \dfrac{\text{Cardiac output}}{\text{Stroke volume}}$
$\text{Heart rate} = \dfrac{5250}{70} = 75 \text{ beats per minute}$
Answer: 75
$\text{Cardiac output} = \text{Stroke volume} \times \text{Heart rate}$
Given:
$\text{Cardiac output} = 5250 \text{ ml/min}$
$\text{Stroke volume} = 70 \text{ ml}$
$\text{Heart rate} = \dfrac{\text{Cardiac output}}{\text{Stroke volume}}$
$\text{Heart rate} = \dfrac{5250}{70} = 75 \text{ beats per minute}$
Answer: 75
Hence, the correct answer is option: 'C'.