Electrolyte Balance · Physiology

Which nephron segment is most important for potassium secretion?

  1. Proximal convoluted tubule segment
  2. Thick ascending limb of Henle's loop
  3. Distal tubule and collecting duct
  4. Thin descending limb of Henle
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Correct answer: Distal tubule and collecting duct

Principal cells in the distal tubule and collecting duct secrete potassium. This process is hormonally regulated.

Difficulty: Medium Question 9 of 20

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