Which digestive component emulsifies fats to aid their digestion?

Which digestive component emulsifies fats to aid their digestion?

• A. Bile
• B. Pepsin
• C. Amylase
• D. Lipase

Answer: (A)

Emulsification of fats is the process that creates small fat droplets with a much larger surface area for enzymes to work on. Bile does this in the small intestine. Produced by the liver and stored in the gallbladder, bile is released into the duodenum when fatty foods enter the intestine. Bile salts have a hydrophobic end that surrounds fat droplets and a hydrophilic end that interacts with water, stabilizing the droplets and preventing them from coalescing. This emulsification increases the surface area available for pancreatic lipase to act, allowing efficient breakdown of triglycerides into fatty acids and monoglycerides. Other enzymes don’t perform emulsification: pepsin digests proteins in the stomach, amylase digests starches, and lipase needs the emulsified fats to work effectively. So, the component that emulsifies fats is bile.

Emulsification of fats is the process that creates small fat droplets with a much larger surface area for enzymes to work on. Bile does this in the small intestine. Produced by the liver and stored in the gallbladder, bile is released into the duodenum when fatty foods enter the intestine. Bile salts have a hydrophobic end that surrounds fat droplets and a hydrophilic end that interacts with water, stabilizing the droplets and preventing them from coalescing. This emulsification increases the surface area available for pancreatic lipase to act, allowing efficient breakdown of triglycerides into fatty acids and monoglycerides. Other enzymes don’t perform emulsification: pepsin digests proteins in the stomach, amylase digests starches, and lipase needs the emulsified fats to work effectively. So, the component that emulsifies fats is bile.