Answer: Stroke volume and heart rate.
- A Heart rate and total blood volume
- B Stroke volume and blood pressure
- C Heart rate and blood pressure
- D Stroke volume and heart rate
Correct answer: D. Stroke volume and heart rate
Explanation: Cardiac output = stroke volume x heart rate, representing the total volume of blood pumped by one ventricle per minute.
A single ECG cycle: the P wave marks atrial depolarisation (contraction signal), the large QRS complex marks ventricular depolarisation, and the T wave marks ventricular repolarisation (recovery) before the next cycle begins.
Concept context
Blood, lymph, the heart, the cardiac cycle, blood pressure, and ECG. High NEET weightage.