NEETBiologyBody Fluids and Its CirculationMCQ+4 / −1
Which two of the following changes (i iv) usually tend to occur in the plain dwellers when they move to high altitudes (3, 500 m or more)?
(i) Increase in red blood cell size
(ii) Increase in red blood cell production
(iii) Increased breathing rate
(iv) Increase in thrombocyte count
Changes occurring are
(i) Increase in red blood cell size
(ii) Increase in red blood cell production
(iii) Increased breathing rate
(iv) Increase in thrombocyte count
Changes occurring are
- A(ii) and (iii)
- B(iii) and (iv)
- C(i) and (iv)
- D(i) and (ii).
View written solutionFree
Correct answer: A
The body undergoes numerous changes at higher elevation in order to increase oxygen delivery to cells and improve efficiency of oxygen use. The early changes includes increased breathing rate, increased heart rate and fluid shifts. The later changes includes increased red blood cell production, increased 2, 3 DPG production and increased number of capillaries.
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