Chapter 5 and 6

Chapter 5 and 6 - Chapter 5 and 6 Nutrition Nutrition - the...

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Chapter 5 and 6 Nutrition Nutrition - the science of how the body uses nutrients in feeds to sustain life and for productive purposes. Nutrient -any chemical substance in the diet that supports or maintains life processes o Essential nutrition: a nutrient that is required in the diet Proper nutrition is essential for proper functioning of various activities in the body. Nutrition influences growth, reproduction, lactation, carcass traits, and general health of the animal. Water-most abundant, cheapest nutrient o Sources: Drinking Feedstuffs Metabolic H2O (by product of reactions in cells) o Functions Transport nutrients and compounds Biochemical reactions in the cell Regulation of body temperature Solvent for solid compounds Lubricates and cushions joints Carbohydrates (CHO) o Includes sugars, starches (easily digested), cellulose (structural, less digestible) o Stored as glycogen in animals o Primary use is to proved energy for the animal Protein o Long chains of amino acids (building blocks) o Made up of C, H, O2, N, and S o Crude protein %N in feed x 6.25 Protein is – 16% N so (100/16) – 6.25 o Functions Basic structural unit Component of lean tissue Metabolism Enzymes Protein hormones Immune system Energy Lipids/fats o Esters of fatty acids and glycogen o Provides 2.25x more energy than CHO or proteins on an equal weight basis o Essential fatty acids o Functions
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Energy supply Heat, insulation, protection Provides essential fatty acids Necessary for the absorption of the fat soluble vitamins Vitamins o Organic compounds o Needed in small amounts for growth and maintenance of animals o Necessary for metabolic reactions in cell (coenzymes or prosthetic groups) o Functions Fat-soluble vitamins Regulation of body functions: vision, blood clotting, and tissue maintenance growth Water-soluble vitamins Body metabolic regulation Minerals o Inorganic components (bones/teeth) o Very important part of body’s enzyme systems (Mg, Mn, Fe, Zn, P) o Serve in mineral/vitamin interrelationships (vitamin E/Se : B12/Co) o Maintain acid-based balance (Na, Cl, K) Functions of feeds o Maintenance Maintaining the body at a constant weight and temperature Nutrients are needed for basic metabolism (breathing, etc.) and normal animal
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This note was uploaded on 10/21/2008 for the course ANSC 1011 taught by Professor Gentry during the Spring '08 term at LSU.

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Chapter 5 and 6 - Chapter 5 and 6 Nutrition Nutrition - the...

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