Which of the following is the site of Na+bile acid cotransport? A. Duodenum B. Ileum C. Antrum D. Colon
B
The site of Na+bile acid cotransport is the ileum (Option B). The ileum is a part of the small intestine, where most of the nutrients from ingested food are absorbed. Bile acids are produced in the liver and stored in the gallbladder before being released into the small intestine to aid in the digestion and absorption of fats. The absorption of bile acids from the ileum back into the bloodstream is crucial for the enterohepatic circulation of bile acids and for the maintenance of cholesterol homeostasis in the body. Na+bile acid cotransport is a process by which bile acids are transported across the luminal membrane of the ileum in association with sodium ions.
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