Formation of a small volume of concentrated urine in dehydration is associated with____________?
Correct answer: B. All of these
- A. More reabsorption in the PCT
- B. All of these
- C. More reabsorption of DCT and collecting ducts
- D. More concentration in loop of Henle
Explanation
Dehydration increases proximal sodium and water reabsorption, strengthens the medullary concentration gradient through the loop of Henle, and raises ADH-mediated water reabsorption in the distal nephron and collecting ducts. Together, these changes produce a small volume of concentrated urine.
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