The erythrocyte count increases after a while when an individual goes from a low to a high altitude because the ________.

temperature is lower at higher altitudes

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basal metabolic rate is higher at high altitudes

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concentration of oxygen and/or total atmospheric pressure is higher at higher altitudes

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concentration of oxygen and/or total atmospheric pressure is lower at high altitudes

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Solution

The correct option is D
concentration of oxygen and/or total atmospheric pressure is lower at high altitudes

The amount of haemoglobin in blood increases at high altitude. This is one of the best-known features of acclimatisation (acclimation) to high altitude. Increasing the amount of haemoglobin in the blood increases the amount of oxygen that can be carried.

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Low concentration of oxygen in the blood and tissues of people living at high altitude is due to..............
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Air at high altitude has a higher percentage of oxygen as compared to that at low altitude.

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