The role of bile in fat digestion is to perform which primary function?

• A. Neutralize acidity
• B. Digest fats
• C. Absorb fats
• D. Emulsification

Answer: (D)

Emulsification is the main way bile helps fat digestion. Bile salts coat fat droplets and break them into tiny, dispersed droplets, dramatically increasing the surface area available for pancreatic lipase to work. This doesn’t digest fats by itself, but it speeds up the breakdown of triglycerides into fatty acids and monoglycerides. Bile isn’t responsible for neutralizing stomach acidity or for absorbing fats directly; absorption happens after digestion when the fat products form micelles with bile salts and are taken up by the intestinal lining.