51. Low concentration of oxygen in the blood and tissues of people living at high altitude is due to…..
a. Low temperature
b. Low atmospheric pressure
c. High atmospheric pressure
d. Both low temperature and high atomospheric pressure
Ans. b
Explanation : Low concentration of oxygen in the blood and tissues of people living at high altitude is due to low partial pressure of oxygen is less then at the ground level. This decreased atomospheric pressure causes release of oxygen from blood
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