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10 Cards in this Set
- Front
- Back
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breakdown and absorption of nutrients
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the main function of the digestive system
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ingestion
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Entrance of nutrients into digestive tract
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mechanical processing
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Physical processing of materials entering digestive tract
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digestion
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Chemical breakdown of food into smaller organic molecules
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secretion
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Release of water, acids, enzymes, buffers, salts
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absorption
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Movement of organic molecules from digestive tract into interstitial fluid of digestive tract
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excretion
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Elimination of waste products from digestive tract (defecation)
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carbohydrates
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-Mono-, di-, poly- saccharides
Starch, sugars -Primary source for energy -Broken down into glucose for use in cellular respiration to obtain ATP -4 calories / gram -glycogen -cellulose |
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lipids
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-Fatty acids, mono-, triglycerides, steroids
Fats, oils, waxes -Shock absorber |
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proteins
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Polypeptides made of amino acids
-20 amino acids -8 essential, 12 nonessential -antibodies -enzymes 4/per gram |
