Which statement accurately describes the major site of fat digestion?

Which statement accurately describes the major site of fat digestion?

• A. The liver provides all enzymes that digest fats in the stomach.
• B. The pancreas secretes enzymes that digest fats only in the colon.
• C. Fat digestion begins in the mouth and stomach, but the majority occurs in the duodenum by pancreatic lipase.
• D. Pancreatic lipase digests all fats in the small intestine.

Answer: (C)

Most fat digestion happens in the small intestine, with the duodenum being the primary site where triglycerides are broken down by pancreatic lipase. Fats are emulsified by bile salts, which increases the surface area for pancreatic lipase to act. This enzyme, with the help of colipase, converts triglycerides into free fatty acids and monoglycerides, which then form micelles for absorption. While there is some lipase activity earlier in the mouth and stomach, the bulk of digestion occurs in the duodenum, making that statement the best description of the major site of fat digestion. The liver does not provide all enzymes for stomach fat digestion, and the colon is not the main site. Pancreatic lipase is the major enzyme in the small intestine, but it does not digest all fats in every context because other lipases and gastric lipase contribute as well.

Most fat digestion happens in the small intestine, with the duodenum being the primary site where triglycerides are broken down by pancreatic lipase. Fats are emulsified by bile salts, which increases the surface area for pancreatic lipase to act. This enzyme, with the help of colipase, converts triglycerides into free fatty acids and monoglycerides, which then form micelles for absorption. While there is some lipase activity earlier in the mouth and stomach, the bulk of digestion occurs in the duodenum, making that statement the best description of the major site of fat digestion. The liver does not provide all enzymes for stomach fat digestion, and the colon is not the main site. Pancreatic lipase is the major enzyme in the small intestine, but it does not digest all fats in every context because other lipases and gastric lipase contribute as well.