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An organic compound that is the body’s main source of energy. Chapter 15
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Carbohydrates fruits Grains Dry beans and peas Vegetables
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Produced by green plants during photosynthesis. The carbohydrate formed by photosynthesis is glucose Glucose is the basic sugar molecule from which all other carbohydrates are built
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Simple Carbohydrates: Sugars Refined and Natural Complex Carbohydrates: Starch and fiber Complex Carbs vs. Simple Carbs (2:46) http://www.youtube.com/watch?v=6esFOqj_IaY
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Refined- removed from plants (sugar cane or sugar beets) and made into sweeteners Table sugarBrown sugar Natural – sugars found in the foods we eat Fructose – comes from fruits Maltose – comes from grains Lactose – comes from dairy
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Fructose Sucrose Glucose Galactose Maltose lactose Range of Sweetness Caramelization – browning reaction that can occur with any kind of sugar How to caramelize sugar – http://www.youtube.com/watch?v=HjqRzyZXwkA (1:38) http://www.youtube.com/watch?v=HjqRzyZXwkA http://www.youtube.com/watch?v=jMiXJE3eXN0http://www.youtube.com/watch?v=jMiXJE3eXN0 (5:45) Solubility – dissolve in water easily because of the many hydroxyl groups Crystallization – occurs when you add more sugar to a solvent than it can dissolve. http://www.youtube.com/watch?v=WQdXbf8huuQ&list=TLWk1HVncEGRk (7:23) http://www.youtube.com/watch?v=WQdXbf8huuQ&list=TLWk1HVncEGRk
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Must be broken down into sugar so they take longer to digest and will provide longer lasting energy Grains OatsWheatRyeRiceMillet Dry beans & peas SoyChickpeasBlackLentilsKidney Potatoes RedRussetFingerwhiteYukon
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Amylose – molecules are linear: they’re long and narrow like a line Amylopectin – have multiple branches, like the veins in a leaf
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Cellulose is fiber that gives plants their structure.
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45-65% of calories should come from carbohydrates Most should come from complex carbohydrates
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Lack of energy Uses protein as energy source Lack of vitamins, minerals, and fibers Not enough cushioning for the organs Central nervous system, kidneys, brain, and muscles won’t function properly
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Stored as excess fat More susceptible to heart disease Simple carbohydrates Raises blood sugar levels
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Whole grains Reduce risk of heart disease minimize chances of getting diabetes Oats Slow down digestion Lowers cholesterol Large amounts Makes you slow and sleepy
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