The physiological elimination of metabolic waste products no longer needed by the organism is termed?
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Answer: B. Excretion
Explanation
Excretion is the biological process by which an organism eliminates metabolic waste products from its body. Organs like the kidneys, lungs, and skin work collaboratively to filter and remove toxic byproducts of metabolism. This critical homeostatic mechanism prevents the accumulation of harmful substances that could disrupt cellular function. Metabolic waste products include urea, carbon dioxide, and excess water generated through various cellular activities. Excretion differs slightly from egestion, which involves expelling undigested food residue rather than metabolic waste. The urinary system plays the primary role in filtering nitrogenous wastes from the bloodstream for removal.
Medical evaluations test kidney function regularly to ensure the efficient excretion of metabolic toxins in patients. Understanding excretory pathways is fundamental for studying human physiology and internal environmental regulation. Artificial dialysis machines replicate natural excretory functions for individuals suffering from renal failure. Option A is incorrect because secretion involves producing and releasing useful substances rather than removing waste. Option C is incorrect because assimilation refers to incorporating absorbed nutrients into bodily tissues. Option D is incorrect because digestion breaks down ingested food rather than eliminating metabolic waste.
- Subject
- Physical Education
- Category
- Physical Education
- Topic
- —
- Difficulty
- medium
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