Acid-base balance · Physiology

Hemoglobin contributes to acid-base balance primarily by:

  1. Binding oxygen only
  2. Acting as a strong acid
  3. Buffering hydrogen ions
  4. Transporting bicarbonate directly
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Correct answer: Buffering hydrogen ions

Hemoglobin buffers hydrogen ions released during CO₂ transport. This helps maintain blood pH.

Difficulty: Medium Question 13 of 20

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