Hypoxia and hypercapnia · Physiology

In chronic hypercapnia, renal compensation occurs by:

  1. Excreting bicarbonate
  2. Retaining bicarbonate
  3. Reducing hydrogen ion secretion
  4. Reducing sodium reabsorption
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Correct answer: Retaining bicarbonate

The kidneys retain bicarbonate to buffer excess acid. This helps compensate for chronic respiratory acidosis.

Difficulty: Medium Question 17 of 20

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