Which one of the following is not responsible for concentration of urine in the kidneys______________?
Correct answer: D. Epinephrine
- A. Aldosterone
- B. Angiotensin II
- C. Vasopressin
- D. Epinephrine
Explanation
Vasopressin directly increases collecting-duct water permeability, while aldosterone and angiotensin II support sodium and water retention that help concentrate urine. Epinephrine is not a normal primary mechanism for urinary concentration.
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