Which two of the following changes (1 - 4) usually tend to occur in the plain dwellers…

Biology · NEET · NTA ExamsBreathing and Exchange of Gases

Which two of the following changes (1 - 4) usually tend to occur in the plain dwellers when they move to high altitudes (3,500 m or more)?

  1. Increase in red blood cell size
  2. Increase in red blood cell production
  3. Increased breathing rate
  4. Increase in thrombocyte count

Changes occurring are:

  1. (2) and (3)
  2. (3) and (4)
  3. (1) and (4)
  4. (1) and (2)

Answer

(A) (2) and (3)

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