Respiratory adaptations · Physiology

The primary immediate respiratory adaptation to high altitude is:

  1. Increased red blood cell count
  2. Increased ventilation
  3. Increased hemoglobin affinity for oxygen
  4. Increased lung surface area
Show answer and explanation

Correct answer: Increased ventilation

Hypoxia at high altitude stimulates peripheral chemoreceptors, increasing ventilation. This helps raise alveolar oxygen partial pressure.

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