Multiple choice

Which of the following statements is true regarding acid base regulation in the body?

  1. Overall human metabolism results in acid production .

  2. Buffers present in kidneys must be strong acids or bases.

  3. Carbon dioxide directly raises the pH of body fluids.

  4. The pH of a buffer solution is always 7.

  5. A rise in the plasma level of bicarbonate ions lowers the pH of plasma.
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A Correct answer
Explanation

Overall the body is a net producer of acid, and a major function of the kidney is to excrete this acid load.

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