326 Lecture 1 - Lecture 1 Overview of Digestion Chapter 2...

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Lecture 1 Overview of Digestion Chapter 2 Food we consume is still outside the body until it is absorbed primarily through the intestinal cells. Food must be broken down into individual units for absorption (digestion). Examples : Protein amino acids Carbohydrate individual sugar Lipid fatty acids, glycerol, monoglyceride Minerals/vitamins freed from protein (want minerals in free form) The main reason food must be digested is because the transport mechanisms that absorb food into the body only recognize the individual subunits of food. This course will examine, in detail, the digestion of carbohydrates, protein, lipids, vitamins and minerals. o Have transporters to move subunits of food 1
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Digestive Anatomy 2 Small intestine: most absorption Liver, pancreas important
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Once digested, the individual subunits of food must be absorbed by the cells of the small intestine for entry into the body. The intestinal cells then, put the absorbed components into the blood or lymphatic system for transport to all the tissues in the body. o
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326 Lecture 1 - Lecture 1 Overview of Digestion Chapter 2...

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