What is the process by which the tubular cells secrete substances into the filtrate?

What is the process by which the tubular cells secrete substances into the filtrate?
  1. reabsorption
  2. ultrafiltration
  3. secretion
  4. glomerular filtration

Solution

During urine formation, the tubular cells secrete substances like H⁺, K⁺ and ammonia into the filtrate. Tubular secretion is also an important step in urine formation as it helps in the maintenance of ionic and acid base balance of body fluids.

Asked in: NCERT

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