1202L12 - Chapter 41 - Digestion and Nutrition Understand...

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Chapter 41 - Digestion and Nutrition Understand what essential nutrients are Know what occurs in each part of the human digestive system Know what enzymes digest proteins, fats and carbohydrates, and where they do it Know how and where nutrients and water are absorbed Understand how herbivores are adapted to digest plant diets Understand how blood glucose level is regulated by negative feedback Digestion and Nutrition 0. Some definitions: 0. __phototroph__________ use light energy to produce carbohydrates 1. Chemotrophs use inorganic chemical reactions to provide energy 2. Heterotrophs need __organic______ compounds 0. Herbivores feed on plant material 1. Carnivores feed on animal tissues 2. Detritivores feed on decaying plant material Nutritional Requirements 1. Carbohydrates comprise about __50%___ of US diet, provide 4 Kcal/g 2. Lipids about 40 %, at least 3 fatty acids essential, 9__ Kcal/g 3. Proteins are remaining 10 %, 9 - 11 amino acids essential, 4.4 Kcal/ g 4. Both fat and water soluble vitamins essential in diet Figure 41.2 Diseases caused by nutritional deficiencies 0. Beriberi (_nervous_______ disorder) caused by lack of vitamin B 1 1. _scurry______ (degeneration of skin) caused by lack of Vitamin C
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2. Rickets (bone deformities) caused by lack of vitamin D Mechanical processes in Digestion 5. Grinding and ___cutting_____ structures (mandibles, radula, teeth) 6. _cilia____move food through gut
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This note was uploaded on 11/13/2009 for the course BIOL 1202 taught by Professor Gregg during the Fall '08 term at LSU.

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1202L12 - Chapter 41 - Digestion and Nutrition Understand...

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