What is the role of the Collecting Duct in maintaining the pH and ionic balance of blood?

What is the role of the Collecting Duct in maintaining the pH and ionic balance of blood?
  1. Reabsorption of HCO₃⁻ and CO₃²⁻
  2. Reabsorption of H⁺ and K⁺
  3. Secretion of Na⁺ and Cl⁻
  4. Secretion of H⁺ and K⁺

Solution

The Collecting Duct plays a role in the maintenance of pH and ionic balance of blood by the selective secretion of H⁺ and K⁺ ions.

Asked in: NCERT

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