When the pH of the blood increases, the amount of oxygen bound to hemoglobin:
Correct answer: D. Decreases
- A. Increases.
- B. None
- C. Remains constant
- D. Decreases
Explanation
As the pH of the blood declines, the amount of oxygen bound to haemoglobin also declines. This occurs because decreased pH results from an increase in hydrogen ions, and the hydrogen ions combine with the protein part of the haemoglobin molecules, causing a decrease in the ability of haemoglobin to bind oxygen. Conversely, an increase in blood pH results in an increased ability of haemoglobin to bind oxygen.
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