11:067:330 Lecture 7: Nutrients
21 Jul 2017
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Nutrient (cid:1543) chemically distinct constituent of feed that aids in the support of life. 6 nutrient classes: (1) carbs (2) lipids (3) proteins (4) vitamins (5) minerals (6) water. Nutrients: provide e, synthesize tissue constituents, serve as cofactors in metabolic reactions. E is needed for all functions of the body. 3 nutrient classes provide the body with e: carbs, lipids, proteins. Amount of e the body can get from nutrients varies. Glucose (3. 73 kcal of e / g) and cellulose (4. 18 kcal / g) are both carbs (cid:1543) average usually 4 kcal/g. Lignin contains 6. 52 kcal/g, but none of this e can be used by animals. Amount of e within a fatty acid (cid:1542) as chain length (number of c) (cid:1542) Acetic acid (2 c) = 3. 43 kcal/g, propionic acid (3 c) = 3. 76 kcal/g, and butyric acid (4 c) = 5. 93 kcal/g. Animal lipids (i. e. fat) = 9. 39 kcal/g and plant lipids (i. e.
