Question

Which among the following changes usually tend to occur in the people living on plain areas when they move to higher altitudes?

• A. Increase in the RBC size.
• B. Increase in the RBC production.
• C. Increased breathing rate.
• D. Increase in the platelet count.

Answer 1

Answer: (B), (C)

The correct options are
B Increase in the RBC production.
C Increased breathing rate.

When a person living on the plains move to higher altitude, the breathing rate increases in response to lower concentrations of oxygen in the blood. This causes more oxygen to be delivered to the alveoli. As the change continues, the bone marrow contributes by increasing the RBC production which in turn increases the blood's oxygen carrying capacity.