Which hormone increases water permeability in the collecting ducts of the mammalian kidney?
Correct answer: C. Antidiuretic hormone
- A. Aldosterone
- B. Atrial natriuretic peptide
- C. Antidiuretic hormone
- D. Parathyroid hormone
Explanation
Antidiuretic hormone, also called vasopressin, inserts aquaporin-2 channels into collecting duct cells and increases water reabsorption. Aldosterone primarily affects sodium and potassium transport rather than directly inserting these water channels.
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