Answer: 120 days.
- A 30 days
- B 60 days
- C 120 days
- D 200 days
Correct answer: C. 120 days
Explanation: Human erythrocytes normally survive about 120 days before being destroyed in the spleen and liver.
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.