NSC 170C1 Lecture Notes - Lecture 5: Ketosis, Sucralose, Polysaccharide
29 Sep 2016
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Document Summary
Every cell uses glucose as an energy source. Most important energy source because a lot of cells can"t use protein or fat. Full digestion of carbs results in monosaccharides. Glucose, fructose, and galactose are absorbed by capillaries then straight to liver. Liver converts fructose and galactose into glucose immediately. Glucose, galactose, and fructose are final product of carbohydrate digestion and ready for absorption. Most common ratio 45:55 glucose:fructose (why hfcs thought to be bad) refined carbohydrates. Very weak satiety (desire to be full) response by leptin in brain. Ingredients portion on food label are refined. Saccharin, aspartame, acesulfame-k, sucralose, neotame, monk fruit extract, stevia leaf extracts. Triggers hunger because cells are not getting glucose. Both fibers aren"t pure sources in nature. Chemical digestion starts in mouth with salivary amylase (enzyme) Chyme drips into small intestine- chemical digestion occurs in small intestine. Pancreas synthesizes amylase and secretes it into small intestine. In small intestine, cells make lactase, maltase ,sucrase.
