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CSU FSHN 150 - Photosynthesis

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FSHN 150 1st Edition Lecture 7Outline of Last LectureI. Physiology of the Digestive SystemOutline of Current LectureII. PhotosynthesisIII. CHO terminologyIV. Dietary Fiberi. Bulking action and binding actionCurrent LectureI. Carbohydratesi. Bodys major fuel sourceii. Simple and complexII. Photosynthesisi. All plant foods have CHOii. Milk is only animal product with CHOiii. Energy source for man-8% for eskimos, >70% some 3rd world countriesiv. Stored as starchIII. CHO terminologyi. Simple=sugarsa. Monosaccharides(one)-glucose frusctose, galacatose, sucroseb. Disaccharides(two)- maltose, sucrose, lactoseii. Complex=starch (Amylose, Amylopectin)a. Polysaccharides have thousands of single glucose moleculesEx. Fiber- different bonding than starchesIV. Polysaccharidesi. Starches, fiber, glycogenii. Multiple glucose units bound togetheriii. Starch (amylose and amylopectin)V. Dietary Fiberi. Undigested plant foodii. Body cant break bondsii. Insoluble fiber- doesn’t dissolve in water, not fermented by bacteria (branand germ)iv. Soluble fiber- absorb in water, fermented by bacteria (endosperm and pectin)VI. Healthy benefits of dietary fiberi. MANYii. Promotes softer larger stool and more regularityiii. Slows glucose absorptioniv. Lowers blood cholesterolv. Lowers risk of heart disease- in turn reducing risk of colon cancer andothervi. types of cancervii. lowers risk of hemorrhoids and diverticulosis(popping a pocket in yourcolon, usually happens to elderly) viii. fiber slows the digestion and absorption of blood glucoseix. if you eat soluble fiber, cholesterol that usually is taken up by bile andtakenx.to liver gets excreted VII. Bulking action of fiberi.Positive effects-a. Replaces high calorie foods, speeds flow through intestines, decreased constipation diverticulosis and hemorrhoids, toxins and carcinogens have less contact time.ii. Negative effects-a. If fiber intake is high there may be a decrease in nutrient intakeespecially mineralsVIII. Binding action of fiberi. Positive effects-a. Binds some carcinogens decrasing risk of colon cancerb. Binds bile decreasing risk of CVDii. Negative effects-a. Binds some mineralsIX. Recommended dietary fiber and CHOi. CHO intake-a. RDA(recommended daily allowance)= 130grams to prevent ketosisb. Reasonable goal:55-60% daily Kcals (from total CHO)45% total from starch (complex)10-15% from simple ii. Fiber intake-25-35g fiber/day (10-13g/1000 kcals)Avg US intake=13g/dayX. Ketosis- incomplete oxidation of fat when CHO is not


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