Question

Which two of the following changes (a–d)
usually tend to occur in the plain dwellers when
they move to high altitudes (3,500 m or more)?
(A) Increase in red blood cell size
(B) Increase in red blood cell production
(C) Increased breathing rate
(D) Increase in thrombocyte count
Changes occurring are:
(a) (B) and (C) (b) (C) and (D)
(c) (A) and (D) (d) (A) and (B)

Answer 1

Answer:

option a

this is because when you move up air becomes thinner and thinner to transport more at to the body parts more red blood cells are produced and the breathing rate is increased