The mechanism by which substances are removed from blood and are directly added to the tubular fluids is called:
Correct answer: C. Tubular secretion
- A. Glomerular filtration
- B. Excretion
- C. Tubular secretion
- D. Tubular reabsorption
Explanation
Tubular secretion is the process where substances are actively transported from the blood into the renal tubular fluid for excretion in urine. This is distinct from glomerular filtration (where substances are filtered into the tubule passively) and tubular reabsorption (where substances are moved from the tubule back to the blood). Excretion is the overall removal of waste from the body.
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About Homeostasis
Homeostasis maintains a stable internal environment through the kidney and urinary system, thermoregulation and excretion. The kidney topics include filtration, selective reabsorption, urine formation and water balance, while thermoregulation involves sweating, vasodilation, vasoconstriction and hormonal control; excretion is different from egestion, which removes undigested food.
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