Which of the Following Statements About Renal Control of Blood

Which of the following statements about renal control of blood acid/base balance is true?

A) Increased metabolism of glutamine by renal tubular cells increases the plasma bicarbonate concentration
B) Excretion in the urine of hydrogen bound to phosphate buffers decreases plasma bicarbonate concentration
C) Hydrogen ion that binds to filtered bicarbonate in the tubular fluid is excreted in the urine
D) Both increased metabolism of glutamine by renal tubular cells increases the plasma bicarbonate concentration and excretion in the urine of hydrogen bound to phosphate buffers decreases plasma bicarbonate concentration are correct
E) Both increased metabolism of glutamine by renal tubular cells increases the plasma bicarbonate concentration and hydrogen ion that binds to filtered bicarbonate in the tubular fluid is excreted in the urine are correct