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Question
A man was brought up at sea level while his brother spent all his life at an altitude of 10,000 feet. The latter will have
A man was brought up at sea level while his brother spent all his life at an altitude of 10,000 feet. The latter will have
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Solution
The correct option is A More active bone marrow
The amount of haemoglobin in the 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. However, there is a downside; when there is too much haemoglobin, blood becomes sticky and viscous and it is harder for the heart to pump the blood around the body. This happens in chronic mountain sickness. So, to increase the haemoglobin concentration, the bone marrow will be more active to generate RBCs. High altitude does not cause low BP, less subdermal fat and active sweat glands.
Therefore, the correct answer is option A.
The amount of haemoglobin in the 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. However, there is a downside; when there is too much haemoglobin, blood becomes sticky and viscous and it is harder for the heart to pump the blood around the body. This happens in chronic mountain sickness. So, to increase the haemoglobin concentration, the bone marrow will be more active to generate RBCs. High altitude does not cause low BP, less subdermal fat and active sweat glands.
Therefore, the correct answer is option A.
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