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Review Question - QID 213769

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QID 213769 (Type "213769" in App Search)
A researcher is testing a new compound that she believes could be used in patients who are suffering from hyponatremia. Specifically, she is studying the effects of a chemical that decreases the reabsorption of water in the kidney. When assaying a model nephron, she finds that the permeability of the cell membrane to water is decreased. Furthermore, she finds that the activation of the G-alpha-s subunit in these cells is intact; however, the total amount of cyclic adenosine monophosphate is decreased. The drug does not appear to have any effect on the central nervous system. The mechanism of this compound is most analogous to which of the following drugs?