Which digestive juice is responsible for breaking down fats according to the material?

• A. Enzymes in saliva.
• B. Bile.
• C. Amylase.
• D. Mucus.

Answer: (B)

Understanding fat digestion hinges on emulsification. Bile, produced by the liver and stored in the gallbladder, contains bile salts that coat fat droplets and break them into much smaller pieces. This emulsification dramatically increases the surface area available for pancreatic lipase to act, allowing triglycerides to be hydrolyzed into fatty acids and monoglycerides. Without bile’s emulsifying action, fats would remain in large droplets and lipase would work far less efficiently. So, the digestive juice that prepares fats for digestion is bile. In contrast, enzymes in saliva mainly target carbohydrates, amylase digests starch, and mucus serves mainly to lubricate and protect the lining rather than digest fats.