Which of the following statements about renal control of blood acid-base balance is TRUE?

Question

Quizplus · Accepted Answer

Increased metabolism of glutamine by renal tubular cells generates new bicarbonate ions, which can be reabsorbed into plasma and increase plasma bicarbonate concentration. Option B is incorrect because excretion of hydrogen bound to phosphate buffers decreases plasma phosphate concentration, not bicarbonate concentration. Option C is incorrect because H⁺ that binds to filtered bicarbonate in the tubular fluid is reabsorbed by the tubular cells and helps generate new bicarbonate ions, rather than being excreted in the urine. Option D is incorrect because when hypoventilation occurs, the kidneys compensate by increasing, not reducing, glutamine metabolism. Option E is incorrect because the kidneys compensate for a metabolic alkalosis by excreting bicarbonate in the urine, not increasing CO₂ production.

Which of the Following Statements About Renal Control of Blood