Besides filtration and reabsorption, the nephron removes drugs, poisons and hydrogen ions from the blood into the tubule fluid by
- A. osmosis
- B. tubular secretion
- C. ultrafiltration
- D. diffusion through the ureter
Explanation
Tubular secretion actively transports selected substances from peritubular capillaries into the tubule, fine tuning both urine composition and blood pH. It is the third urine forming process after filtration and reabsorption.
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