Place the steps of triglyceride digestion and absorption in the correct order. Salivary and gastric lipase partially digest fats in the stomach. In the absorptive cell, monoglycerides, and fatty acids are combined to become triglycerides. Bile salts emulsify fats into smaller particles called micelles. Chyme containing large fat droplets enters the small intestine. Micelles are reformed from the end products of digestion and transported to the edge of the absorptive cell of the small intestine.
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Steps in Fat Digestion After you eat a fatty meal, the gallbladder releases bile into the digestive tract. The larger surface area of the emulsification droplets allows lipases to break down triglyceride fat into fatty acids and monoglycerides. Once inside the brush border cells, fatty acids and monoglycerides combine to form triglycerides again. Triglycerides are bound with a protein to form lipoprotein and are then able to eventually enter the bloodstream and move throughout the body. Fatty acids and monoglycerides are small enough to diffuse through the cell membrane of the brush border cells. In the small intestine, bile salts mix with the fat, which is composed largely of triglycerides. The bile salts collect on the triglyceride fat and allow smaller droplets to emulsify.
Madhur L.
The vast majority of fat digestion occurs in the portion of the GI tract. It begins when triglycerides are emulsified by from the gallbladder. The bile was originally made by the and is made of cholesterol with a small amino acid attached. This substance from the gall bladder coats the fat and forms a lipid droplet called a . An enzyme called is then released by the and that enzyme will break down triglycerides into monoglycerides, , and . This lipid droplet (with fat soluble vitamins and cholesterol included with the triglyceride break down products) will cross into the villi cell. Once in the cell, the long chain fatty acids and recombine to form triglycerides and these join with fat soluble vitamins, proteins, and to form the , which is one of several lipoproteins that transport lipids in the blood. The chylomicron will move into the system and eventually enter the blood stream. In contrast to the above mentioned lipids, the glycerol and the are smaller compounds and can move directly into the cell and on to the .
Marisa A.
Put the steps of fat digestion and absorption in order from first (1) to last occurring event (8).
Sri K.
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