The number of RBC in a man increases if he li | vedclass

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(B) At higher altitudes,the atmospheric pressure decreases,which leads to a lower partial pressure of oxygen $(pO_2)$.This results in hypoxia (low oxy

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There is less oxygen

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(B) At higher altitudes,the atmospheric pressure decreases,which leads to a lower partial pressure of oxygen $(pO_2)$.This results in hypoxia (low oxygen availability) in the tissues.To compensate for this reduced oxygen supply,the body stimulates the kidneys to release the hormone erythropoietin.Erythropoietin stimulates the bone marrow to increase the production of $RBC$s,thereby increasing the oxygen-carrying capacity of the blood.

The number of $RBC$ in a man increases if he lives at a higher altitude because:

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