Why does the red blood cell count increase in humans as they start living at high altitude?
1 )
to allow more carbon dioxide to be excreted by the lungs, preventing a fall in blood pH
to allow more oxygen to be taken up by the haemoglobin as the partial pressure of oxygen is lower
3 )
to allow more oxygen to be taken up by the lungs as there is a lower percentage of oxygen in the air
4 )
to allow more oxygen to be transported as the affinity of haemoglobin for oxygen is lowered
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