Nutri Sci 132 Book Notes

Nutri Sci 132 Book Notes - Nutri Sci 132 Chapter 1 20:09...

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Unformatted text preview: Nutri Sci 132 Chapter 1 20:09 Introduction Nutrition is one of the most powerful ways you can improve your health Use trial and error to find how things work An Ecological Perspective Meet the Nutrients Nutrients Substances that the body uses for various purposes Essential Necessary to life and the body cannot synthesize it itself Water Need the most of this nutrient Gives form to cells, cools us, excretes waste, dissolves substances, and provides a solvent for chemical reactions to take place Macronutrients Nutrients we need in large quantities 3 main nutrients: Carbohydrates, fats, Protein Carbohydrates Supply energy Burn it as fuel Only fuel the brain can use Nutrient in the shortest supply Simple Sugar Rapidly absorbed into the blood stream Complex Polymers of sugar Chains of simple sugars Ex. Starch, fiber Slower absorbed in blood Longer lasting source of energy Fat (Lipid) Supplies energy Burned at low intensity Contains a lot of calories A unit of energy Not used as fuel for the brain Common and familiar fats Ex. Cholesterol, a sterol, is well known in heart disease Protein Body has most uses for protein Form muscle and connective tissue, bone and skin Important chemicals and regulators Enzymes The most vital chemical regulators throughout nature Energy Used for movement, growth, brain function, chemical reactions Stored in the body as chemical energy Found in the 3 macronutrients Found in alcohol Micronutrients We need in tiny amounts Vitamins Fat Soluble vitamins A, D, E, K Water Soluble Vitamins C, thiamin, riboflavin, niacin, and folate Organic Contain carbon Minerals Inorganic They contain no carbon Major minerals Needed in relatively large amounts Trace minerals Needed in tiny amounts Non-nutrients that affect health Phytochemicals May help prevent cancer, heart disease, and other chronic diseases Beneficial, but not nutrients Not essential for life Nutritional Assessment Looked at by a dietician Individual recommendations are given that apply to ones specific life style Anthropometric measurements are taken Height, weight, body fat Biochemical Tests Blood and urine tests, blood sugar, blood cholesterol, and hemoglobin Clinical data Ex. Angiogram, EKG, which evaluate heart disease Dietary Find out your habits and what you eat The Science of Nutrition: The Process of Scientific Discovery Helps us discover knowledge Provides reliable information The Problems of Anecdotal Evidence Evidence that is our personal experience Personal reports are often unreliable Placebo A drug or other substance with no inherent treatment value which affects an individual through the psychological power of their belief in its efficacy Any supplement will have a safety risk...
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This note was uploaded on 03/21/2012 for the course NUTR SCI 132 taught by Professor Anderson during the Fall '09 term at Wisconsin.

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Nutri Sci 132 Book Notes - Nutri Sci 132 Chapter 1 20:09...

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