The artificial filtration of nitrogenous wastes from the blood
Explanation
In human physiology, the kidneys are the primary organs responsible for the excretory system. They filter blood to remove metabolic by-products, specifically nitrogenous wastes like urea and creatinine. When the kidneys fail to function adequately (renal failure), medical intervention is required to perform this filtration artificially.Option Analysis:
- The natural process of blood clotting is incorrect: The natural process of blood clotting is technically termed coagulation or hemostasis. It involves platelets and plasma proteins (fibrinogen) preventing excessive bleeding, which is distinct from filtration.
- The artificial filtration of nitrogenous wastes from the blood is correct: Dialysis (specifically Hemodialysis) is the procedure used to remove waste products and excess fluid from the blood when the kidneys stop working properly. Blood is pumped through a dialyzer (artificial kidney) containing a semi-permeable membrane that filters out nitrogenous wastes while retaining blood cells and proteins.
- The measurement of arterial pulse rate is incorrect: The measurement of arterial pulse rate is a vital sign assessment related to cardiovascular health, not the excretory system.
- The active transport of water in plant tissues is incorrect: The transport of water in plant tissues is a function of the xylem and involves physical processes such as transpiration pull and root pressure, unrelated to the medical term dialysis.
Key Takeaway: Dialysis is an artificial method of maintaining the body's chemical balance by filtering nitrogenous wastes and excess water from the blood in patients with kidney failure.