How does tubular secretion help in maintaining ionic and acid-base balance in body fluids?

Answers (1)

For maintaining the acid-base balance in the fluids of our body on an ionic level, Tubular secretion is responsible. The process can be elaborated as below:

Proximal Convoluted Tubule
A selective secretion takes place. It involves ammonia, hydrogen ions and potassium in the Proximal Convoluted Tubule, which maintains the acid-base balance or the pH balance in the fluids of our body.

Distal Convoluted Tubule
A Selective secretion takes place in Distal Convoluted Tubule which contains hydrogen ions, ammonia, and potassium along with the absorption of the ions of bicarbonate. Just like PCT, this process also helps in maintaining the pH balance in the fluids of our body.

Collecting Duct
Hydrogen and potassium ions are selectively secreted in the collecting duct, which helps to maintain a balance of ions as well as in terms of pH values.

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