Question

what does bile do in the small intestine?
regulate ph levels
break down proteins
break down carbohydrates
transport nutrients
emulsify fats

Explanation:

Bile is produced by the liver and stored in the gallbladder. When it enters the small intestine, its main function is to emulsify fats. Emulsification breaks large fat globules into smaller droplets, increasing the surface area for lipase (a fat - digesting enzyme) to act on.

• Regulating pH levels in the small intestine is mainly done by bicarbonate ions (not bile).
• Proteins are broken down by enzymes like pepsin (in the stomach) and trypsin (in the small intestine), not bile.
• Carbohydrates are broken down by enzymes such as amylase (in the mouth and small intestine), not bile.
• Transporting nutrients is a function of the intestinal epithelium and the circulatory/lymphatic systems, not bile.

Answer:

Emulsify fats