Respiratory adaptations · Physiology

Which adaptation helps prevent excessive respiratory alkalosis during chronic altitude exposure?

  1. Decreased ventilation
  2. Renal bicarbonate excretion
  3. Increased carbon dioxide production
  4. Reduced hemoglobin concentration
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Correct answer: Renal bicarbonate excretion

Renal loss of bicarbonate compensates for alkalosis. This stabilizes blood pH while ventilation remains high.

Difficulty: Medium Question 17 of 20

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