Clinical Chemistry II Practice Test

Which excretion route is described as elimination via stool via hepatic and biliary pathways?

Urine (renal) Stool (hepatic, biliary) Exhalation (pulmonary) Sweat

Correct Answer:

Stool (hepatic, biliary)

Explanation:

Elimination through the hepatic and biliary pathways refers to how substances are processed by the liver, secreted into bile, and then carried into the intestine to be excreted in the stool. This route is distinct from renal excretion (into urine), exhalation (through the lungs for volatile substances), or sweat (through skin). The liver conjugates and secretes certain substances into bile via transporters, so larger or more polar compounds end up in the feces after biliary excretion. Sometimes these substances can undergo enterohepatic recirculation, but the end result is elimination in stool.

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