Q. Which of the following changes usually tends to occur in plain dwellers when they move to the high altitudes? I. Increased breathing rate II. Increased RBC production III. Increased WBC production IV. Increased thrombocyte count Choose the correct option

A) I and II
B) III and IV
C) I and IV
D) I and II
Explanation

When a person moves to higher altitudes, $\rho O_{2}$ and total atmospheric pressure decreases. Hypoxia stimulates the juxta-glomerular cells of the kidney to release erythropoietin hormone, which stimulates erythropoiesis in the bone marrow, causing polycythemia. Hypoxia increases the breathing rate and number of RBC

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.