This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
[{'content': 'Acclimatization does not include: \nSelect and explain. \nA. Hyperventilation, B. Decreased concentration of 2,3 DPG in RBC, C. Increased erythropoiesis, D. Kidney excrete more alkali', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Acclimatization: The respiratory alkalosis\xa0produced by the hyperventilation shifts the\xa0oxygen-hemoglobin dissociation curve to\xa0the left, but a concomitant increase in red\xa0blood cell 2,3-BPG tends to decrease the O2 affinity of hemoglobin. The net effect is a\xa0small increase in P50 (right shift).\nErythropoietin secretion increases promptly on ascent to high altitude. The increase\xa0in circulating red blood cells triggered by\xa0the erythropoietin begins in 2-3 days and is\xa0sustained as long as the individual remains at high altitude.', 'role': 'assistant'}]