Vasopressin Has Which of the Following Actions

Multiple Choice

Vasopressin has which of the following actions?

A) It increases the water permeability of the thick ascending limb of Henle's loop.
B) It increases the urea permeability in the cortical portion of the collecting duct.
C) It increases the water permeability in the collecting duct.
D) It decreases the GFR.
E) It increases the water permeability in the proximal tubule.