Urine Concentration and Dilution · Physiology

Which nephron segment is responsible for fine-tuning urine dilution?

  1. Proximal tubule
  2. Thin descending limb
  3. Thick ascending limb
  4. Collecting duct
Show answer and explanation

Correct answer: Collecting duct

The collecting duct adjusts water reabsorption under ADH control. It determines final urine concentration.

Difficulty: Medium Question 18 of 20

Practice all 20 Urine Concentration and Dilution questions

Keep practicing

More Urine Concentration and Dilution questions