After bile secretion, ultimate elimination route for these substances is through which excretion pathway?

Study liver anatomy and function with our medical students test. Engage with detailed multiple choice questions, each with hints and explanations. Prepare effectively for your test!

Substances secreted into bile are meant to be disposed of through the intestinal tract. When bile reaches the gut, these components, especially conjugated bilirubin along with bile acids and cholesterol metabolites, are eliminated with the feces. In the intestine, bilirubin is converted by bacteria to urobilinogen; most of this becomes stercobilin, giving stool its brown color. Some urobilinogen can be reabsorbed and appear in urine, but the major final excretion pathway for these bile-secreted substances is fecal elimination. The other routes—urine, expired air, or sweat—are not the primary ways these substances are excreted.