Which of the following describes an antiport system on the basal side of renal tubule cells?

A) It exchanges K+ for Na+.
B) It transports CO2 from the blood into the tubule cells.
C) It exchanges H+ for Na+.
D) It transports bicarbonate from the tubular fluid back into the tubule cells.
E) It transports H+ in both directions across the epithelium.


A

Anatomy & Physiology

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