Q:

The atmospheric pressure at earth’s surface close to the sea level averages 760 mm of Hg. If a man lives at an altitude of 13000 feet above the sea level for few years, the main physiological effect is:

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The atmospheric pressure at earth’s surface close to the sea level averages 760 mm of Hg. If a man lives at an altitude of 13000 feet above the sea level for few years, the main physiological effect is:


  1. Decrease in respiration
  2. Increase in concentration of hemoglobin
  3. Decrease in concentration of hemoglobin
  4. Decrease in cardiac output
  5. Increased concentration of urine

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b) Increase in concentration of hemoglobin

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