ADH increases the permeability of the distal convoluted tubules and collecting ducts by
A. incorporating aquaporin-2 channels into the apical membrane.
B. incorporating aquaporin-3 channels into the apical membrane.
C. increasing the number of Na+ ? transport proteins in the membranes.
D. decreasing the number of aquaporin-4 channels in the apical membrane.
Answer: A
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