If a patient develops chronic hypoxemia due to advanced COPD, which compensatory mechanism involving 2,3-BPG (2,3-bisphosphoglycerate) helps to maintain adequate tissue oxygen delivery despite reduced arterial oxygen saturation?

💡 Explanation

Increased 2,3-BPG production shifts the hemoglobin oxygen dissociation curve to the right, reducing hemoglobin's affinity for oxygen and therefore promoting oxygen unloading in tissues. This allows tissues to extract more oxygen from the blood, rather than hemoglobin retaining it under hypoxic conditions.

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