What substance emulsifies fats in the small intestine?

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Multiple Choice

What substance emulsifies fats in the small intestine?

In fat digestion, breaking fats into tiny droplets is essential so enzymes can attack them effectively. The substance that does this emulsifying work in the small intestine is bile. Bile contains bile salts that act as emulsifiers: they surround fat droplets with both hydrophobic and hydrophilic regions, reducing surface tension and keeping the droplets dispersed in the watery intestinal contents. This dramatically increases the surface area available for pancreatic lipase to digest fats. Bile is produced by the liver, stored in the gallbladder, and released into the small intestine when fats arrive. This is why fats are efficiently broken down there. The other options don’t emulsify fats: amylase digests carbohydrates, pepsin digests proteins in the stomach, and mucus mainly provides protection and lubrication rather than emulsifying fats.

In fat digestion, breaking fats into tiny droplets is essential so enzymes can attack them effectively. The substance that does this emulsifying work in the small intestine is bile. Bile contains bile salts that act as emulsifiers: they surround fat droplets with both hydrophobic and hydrophilic regions, reducing surface tension and keeping the droplets dispersed in the watery intestinal contents. This dramatically increases the surface area available for pancreatic lipase to digest fats.

Bile is produced by the liver, stored in the gallbladder, and released into the small intestine when fats arrive. This is why fats are efficiently broken down there. The other options don’t emulsify fats: amylase digests carbohydrates, pepsin digests proteins in the stomach, and mucus mainly provides protection and lubrication rather than emulsifying fats.

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