Nutrient Absorption

Nutrient Absorption - nature the nutrient. Carbohydrates...

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Nutrient Absorption The large surface area of the small intestine significantly increases the absorption of nutrients ( see Figure 4 ). The circular folds force chyme to flow in a spiral-like path through the small intestine, increasing the amount of contact between the chyme and the surface epithelium. Projecting from the surface are villi which contain blood vessels and lacteals . Microvilli on the surface of the villi contain some digestive enzymes and further increase the surface area of the intestinal epithelial. Figure 4 Nutrient absorption in the small intestine occurs via a variety of methods, dependent upon the
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Unformatted text preview: nature the nutrient. Carbohydrates Salivary and pancreatic amylase begin carbohydrate digestion. Enzymes located on the microvilli (brush border) act upon the resulting oligosaccharides , breaking them down into monosaccharides . Absorption into the intestinal epithelial cells occurs by secondary active transport ; the monosaccharides are then transported into the blood by facilitated diffusion . ( See Figure 5 ). Fiber moves through GI tract undigested. Figure 5...
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This note was uploaded on 01/30/2012 for the course BSC BSC1085 taught by Professor Sharonsimpson during the Fall '10 term at Broward College.

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