Answer: Red blood cell production in bone marrow.
- A White blood cell production within lymphoid tissue
- B Red blood cell production in bone marrow
- C Platelet production from bone marrow megakaryocytes
- D Insulin secretion from pancreatic beta cells
Correct answer: B. Red blood cell production in bone marrow
Explanation: Erythropoietin (EPO): produced by kidneys in response to low O<sub>2</sub>. Stimulates red blood cell (erythrocyte) production in bone marrow.
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.