Multiple choice

RBCs have the quality to change themselves according to the surrounding conditions. When a person ascends to high altitudes, what changes occur in red blood cells?

  1. Increase in size

  2. Increase in number

  3. Decrease in size

  4. Decrease in number

  5. -
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

At high altitude, RBCs of human blood increase in number to accommodate larger amount of haemoglobin for the increased uptake of oxygen, which is present in lesser amounts at higher altitudes.

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