A patient with a diagnosis of respiratory acidosis is experiencing renal compensation. What function does the kidney perform to assist in restoring acid–base balance?
A) Sequestering free hydrogen ions in the nephrons
B) Returning bicarbonate to the body's circulation
C) Returning acid to the body's circulation
D) Excreting bicarbonate in the urine
Ans: B
Feedback:
The kidney performs two major functions to assist in acid–base balance. The first is to reabsorb and return to the body's circulation any bicarbonate from the urinary filtrate; the second is to excrete acid in the urine. Retaining bicarbonate will counteract an acidotic state. The nephrons do not sequester free hydrogen ions.
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