In holozoic animal nutrition, what is the biological function of bile salts secreted by the liver into the duodenum?
Answer and explanation
Correct answer: C. emulsifying large dietary lipid droplets into minute micelles to expand surface area
- Step 1: Bile contains no digestive enzymes but contains bile salts (sodium glycocholate and taurocholate). Step 2. Bile salts emulsify large hydrophobic fat globules into tiny droplets, greatly increasing surface area for pancreatic lipase attack. Step 3. They also neutralize acidic chyme. Answer: emulsifying large dietary lipid droplets into minute micelles to expand surface area. Why not the others: Bile does not hydrolyze proteins; it neutralizes acid rather than acidifying; it does not synthesize vitamins.
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