When blood starts to become more alkaline than normal, the renal tubules begin to
A. secrete H+ while reabsorbing bicarbonate in exchange through type A cells.
B. secrete bicarbonate while reabsorbing H+ in exchange through type B cells.
C. secrete bicarbonate and H+ through type B cells.
D. absorb bicarbonate and H+ through type A cells.
Answer: B
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