Erythrocyte physiology · Physiology

Erythrocytes contribute to acid–base balance mainly by:

  1. Continuously releasing lactic acid into plasma
  2. Buffering hydrogen ions with hemoglobin
  3. Actively excreting metabolic acids
  4. Producing bicarbonate only within the plasma
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Correct answer: Buffering hydrogen ions with hemoglobin

Hemoglobin acts as an important buffer by binding hydrogen ions. This helps maintain blood pH within normal limits.

Difficulty: Medium Question 19 of 20

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