Answer: Heart rate and stroke volume.
- A Blood pressure and total peripheral resistance
- B Heart rate and stroke volume
- C Heart rate and total blood volume
- D Stroke volume and total blood volume
Correct answer: B. Heart rate and stroke volume
Explanation: Cardiac output (volume of blood pumped per minute) equals heart rate multiplied by stroke volume (volume ejected per beat).
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.