Result of acclimatization | PGI Nov 2017 Preparations MCQ

All of the following occur as a result of acclimatization. except :

A. Polycythemia
B. Vasodilation in pulmonary vessel 
C. Increased diffusion capacity of lung 
D. Increase in pulmonary ventilation
E. Decrease in pulmonary ventilation

Answer. B. Vasodilation in pulmonary vessel ; (E) Decrease in pulmonary ventilation

Acclimatization refers to change in body tissues in response to long term exposure to hypoxia (i.e. at high attitude for days, weeks or years)

1. ­Great increase in pulmonary ventilation.

2. ­in RBC - polycythemia

3. Increased diffusion capacity of lungs

4. Pulmonary HT - due to vaso constriction in pulmonary vessels.

5. Capillary density increases in skeletal & cardiac muscle.

6. Increased ability of cell to use O₂, despite low pO₂.