February 13 2012 Carbohydrate

February 13 2012 Carbohydrate - Carbohydrates Lei 12 Sp...

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Carbohydrates Lei 12 Sp
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Carbohydrates • Functions: – Main source of energy for cells – Spare protein – Add bulk to foods – Provide fiber • Sources: grains, fruits, dairy products 2
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Carbohydrates • Simple carbohydrates: sugars – molecule with 6 carbon atoms & oxygen and hydrogen • Complex carbohydrates: starches & fiber – sometimes called poly saccharides – long chains of sugar units 3
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Monosaccharides • Six carbon molecules – Glucose - the body's predominant fuel – Fructose - fruit sugar – Galactose - one of the two components of the milk sugar lactose 4
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Disaccharides • Sucrose – a combination of glucose and fructose • Lactose – a combination of glucose and galactose • Maltose – a combination of glucose and glucose 5
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Polysaccharides • Glycogen – animal starch - configured in long chains of glucose molecules – the body's storage form of carbohydrate • Starch from plant sources • Fiber – plant material - long chains of glucose molecules whose structure is resistant to enzymatic degradation – cellulose, hemicellulose and pectin 6
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Common dietary carbohydrate sources 7 Rice Wheat Maize Potato Apple Orange Grapes Cane Beet Honey Corn Syrup Milk Poly- Starch Starch Di- Maltose Sucrose Sucrose Lactose Mono- Glucose Fructose Galactose Glucose Glucose Glucose
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Lower Cholesterol and Heart Risk
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February 13 2012 Carbohydrate - Carbohydrates Lei 12 Sp...

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