Chpt 24 Nutrition and Metabolism part 2

Chpt 24 Nutrition and Metabolism part 2 - 1 Cholesterol...

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Unformatted text preview: 1 Cholesterol Figure 24.22 1. Very Low Density Lipoproteins (VLDL) 2. Low Density Lipoproteins (LDL) 3. High Density Lipoproteins (HDL)- Role in health: LDL / HDL ratio; total HDL 26-2 Total Cholesterol • Desirable to maintain total cholesterol concentration of < 200 mg/dL – most cholesterol is endogenous – dietary restrictions lower blood cholesterol levels 26-3 Desirable Lipoprotein Levels • High levels of HDL • Low levels LDL • Recommendations 26-4 Lipoprotein Processing • Three pathways 26-5 Proteins • 12-15% of body mass • Functions – muscle contraction – cell membranes – fibrous proteins – globular proteins – plasma proteins: 26-6 Essential Amino Acids Figure 24.2 26-7 Nitrogen Balance • Rate of nitrogen ingestion equals rate of excretion • Positive nitrogen balance • Negative nitrogen balance 26-8 Functions of Minerals • Calcium and phosphorus • Phosphorus • Calcium, iron, magnesium and manganese • Iron • Chlorine • Mineral salts 26-9 Dietary Sources of Minerals • Vegetables, legumes, milk, eggs, fish and shellfish • Animal tissues contain large amounts of salt • Recommended sodium intake is 1.1 g/day • Typical American diet contains 4.5 g/day 26-10 Vitamins • Body synthesizes some vitamins from precursors – niacin, vitamin A and D – vitamin K, pantothenic acid, biotin, folic acid • produced by intestinal bacteria • Water-soluble vitamins (C, B) – absorbed with water in small intestine; not stored • Fat-soluble vitamins (A, D, E, K) – absorbed with dietary lipids; stored 26-11 Carbohydrate Metabolism • Dietary carbohydrate burned as fuel within hours of absorption (glucose catabolism) C 6 H 12 O 6 + 6O 2 → 6CO 2 + 6H 2 O • Transfers energy from sugar to ATP 12...
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This note was uploaded on 04/07/2008 for the course BIO 103 taught by Professor Washington during the Fall '08 term at University of Evansville.

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Chpt 24 Nutrition and Metabolism part 2 - 1 Cholesterol...

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