A) increase in number
B) decrease in number
C) decrease in size
D) increase in size
Correct Answer: A
Solution :
At height above 8000 m from sea level, the partial pressure of \[{{O}_{3}}\] in air is decreased. As a result less haemoglobin is formed and the person suffers from dizziness, breathlessness etc. This is called mountain sickness. A continuous exposure to this height increases ventilation to about 3 to 7 times normal then there is significant increase in RBC count and haemoglobin content in blood and breathing becomes normal.
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