Human Nutrition - • Obesity • Heart disease &...

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Unformatted text preview: • Obesity • Heart disease & Arteriolosclerosis • Diabetes • Genetically modified foods • Artificial sweeteners • Diets Nutrition Nutrition What are nutrients? ❂ Essential substances that your body needs in order to grow and stay healthy What is a Nutrient? Nutrients • Some provide energy. • All help build cells and tissues, regulate bodily processes such as breathing. • No single food supplies all the nutrients the body needs to function. Nutrients in the Human Diet Nutrients in the Human Diet ❂ Macronutrients • Water • Amino Acids and Proteins • Lipids • Carbohydrates ❂ Micronutrients • Vitamins Six categories of nutrients: What is a calorie? ❂ The energy obtained from carbohydrates, proteins, and fats is measured in units called calories . Calories Healthy Diets Require: • Water • Carbs, Proteins, Lipids, Amino Acids • Vitamins: - water-soluble (thiamine, riboflavin, folic acid)- fat-soluble (Vitamin A, D, E, K) • Minerals (Fe, Ca, P, Na, K) Healthy Eating Pyramid Figure 24.1b Red meat, butter: use sparingly Vegetables in abundance Whole-grain foods at most meals Daily excercise and weight control Dairy or calcium supplement: 1–2 servings White rice, white bread, potatoes, pasta, sweets: use sparingly Fish, poultry, eggs: 0–2 servings Nuts, legumes: 1–3 servings Fruits: 2–3 servings Plant oils at most meals The Food Pyramid www.mypyramid.gov www.mypyramid.gov Water Water ❂ Solvent in which the chemistry of life Solvent in which the chemistry of life occurs occurs • cell chemistry occurs in an aqueous cell chemistry occurs in an aqueous medium medium • water carries essential nutrients to cells water carries essential nutrients to cells • water carries metabolic wastes away water carries metabolic wastes away from cells from cells • hydrolysis & dehydration reaction hydrolysis & dehydration reaction • stabilizes body temp stabilizes body temp Carbohydrates Carbohydrates ❂ Energy Metabolism • catabolism of glucose during cellular respiration yields ATP for energy- requiring activities • glucose stored as glycogen in the liver and muscle cell fibers Carbohydrates Carbohydrates ❂ Dietary Fiber • water-insoluble fiber adds bulk to fecal matter facilitating its passage through and...
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This note was uploaded on 04/19/2011 for the course BIOL 101 taught by Professor Wong during the Fall '09 term at University of Hawaii, Manoa.

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Human Nutrition - • Obesity • Heart disease &...

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