SCIENCE
CIRCULATORY SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Haemoglobin has an increased binding affinity for oxygen to become deep red in colour
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Red cell concentration becomes considerably above the average in response to lowered oxygen pressure
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The rate of capillary circulation increases in the skin to make it look pinkish
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All of the above
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Detailed explanation-1: -question answer. People who live at high altitudes have rosy cheeks Because: A) Haemoglobin has an increased binding affinity for oxygen to become deep red in colour.
Detailed explanation-2: -At high altitude, hypoxia-induced erythropoietic drive results in erythrocytosis and an increase in hemoglobin concentration and hematocrit, 2 whereas plasma volume decreases at high altitude.
Detailed explanation-3: -In later stages, there can be facial flushing, irritability, difficulty in concentrating, ringing in the ears and visual disturbances. Loss of appetite, insomnia, heart palpitations and a rapid heart rate are also common. As soon as symptoms occur, experts recommend descending.
Detailed explanation-4: -The study, published November 7 by the Journal of Experimental Medicine, reveals that high-altitude, low-oxygen dwellers prone to chronic mountain sickness produce massive amounts of red blood cells thanks to overproduction of the enzyme SENP1.
Detailed explanation-5: -Within the first few hours of altitude exposure, water loss also increases, which can result in dehydration. Altitude can also increase your metabolism while suppressing your appetite, meaning you’ll have to eat more than you feel like to maintain a neutral energy balance.