Acid-Base Disorders · Pharmacology

Which buffer system is the primary extracellular buffer in the body?

  1. Phosphate buffer
  2. Protein buffer
  3. Bicarbonate buffer
  4. Hemoglobin buffer
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Correct answer: Bicarbonate buffer

The bicarbonate buffer system is the primary extracellular buffering system. It regulates pH through the balance of bicarbonate and carbonic acid, influenced by renal and respiratory systems.

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