What function does the kidney perform to assist in maintaining acid–base balance within the necessary normal range?
A) Excrete acid in the lungs
B) Return bicarbonate to the body's circulation
C) Return acid to the body's circulation
D) Excrete bicarbonate in the urine
Ans: B
Feedback: The kidney performs two major functions to assist in this 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. Therefore options A, C, and D are incorrect.
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