Bile helps in the digestion of fat because it
Correct answer: D. emulsifies fat into tiny droplets, greatly increasing the surface area for lipase
- A. contains the enzyme lipase
- B. converts fatty acids into glycerol
- C. makes the duodenum acidic
- D. emulsifies fat into tiny droplets, greatly increasing the surface area for lipase
Explanation
Bile salts are detergents that break large fat globules into a suspension of tiny droplets, and since lipase can only act at the surface of a droplet this multiplies the area available and speeds digestion enormously. Bile contains no enzyme of its own, which is the point students most often get wrong. It is also alkaline, so it neutralises the acid chyme arriving from the stomach.
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About Human Digestive System
The human digestive system breaks food into absorbable molecules through mechanical processing, enzyme action and chemical conditions along the alimentary canal. Questions cover the mouth, stomach, small and large intestines, liver, pancreas and associated secretions, including the digestion and absorption of carbohydrates, proteins, lipids, vitamins, minerals and water.
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