Respiratory adaptations · Physiology

Long-term residence at high altitude leads to increased oxygen-carrying capacity mainly due to:

  1. Increased plasma volume
  2. Increased erythropoietin secretion
  3. Reduced hemoglobin breakdown
  4. Increased alveolar ventilation only
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Correct answer: Increased erythropoietin secretion

Chronic hypoxia stimulates erythropoietin release from the kidneys. This increases red blood cell production and hemoglobin concentration.

Difficulty: Medium Question 2 of 20

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