Question

What is tubular secretion?

Answer 1

The substance that remains in the collecting duct of the kidneys followingreabsorption is better known as urine. ... Tubular secretion is the transfer of materials from peritubular capillaries to the renal tubular lumen and occurs mainly by active transport and passive diffusion.

Answer 2

Certain substances like potassium ion and drugs like penicillin are passed in the distal convulated tubule . This passage involves activity of the cells of tubular wall and is hence called tubular secretion .