NutritionReview

NutritionReview - Nutrition 101 Exam 1 Review Overview: Be...

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Nutrition 101 – Exam 1 Review Overview: Be able to define the following: Nutrition: the science of foods and the nutrients and other substances they contain, and of their actions within the body (including ingestion, digestion, absorption, transport, metabolism, and excretion). A broader definition includes the social, economic, cultural, and psychological implications of food and eating. Nutrients (6 classes and their energy yield): Macronutrient- required in large amounts (g) daily- vs. Micronutrient- required in small amounts (mg or μ g) daily Essential nutrients: nutrients a person must obtain from food because the body cannot make them for itself in sufficient quantity to meet physiological needs Calorie/kilocalorie and how it is measured in food: kilocalorie: amount of heat needed to raise 1kg of water by 1 ° C shortened to calorie in common use Energy Density- a measure of the energy a food provides relative to the amount of food (kcal/g)- fat has highest energy density: 9 kcal/g. vs. Nutrient Density: measure of the nutrients a food provides relative to the amount of food- grapes are more nutrient dense than apples Energy recommendations Enrichment- the addition of nutrients that were lost during processing so that a food will meet a specified standard. vs. Fortification: the addition of nutrients that were either not originally present or present in insignificant amounts; can be used to correct or prevent a widespread nutrient deficiency or to balance the total nutrient profile of a food Malnutrition, primary- a nutrient deficiency caused by inadequate dietary intake of a nutrient vs. secondary: a nutrient deficiency caused by something other than an inadequate intake such as a disease condition or dug interaction that reduces absorption, accelerates use, hastens excretion, or destroys the nutrient. Covert vs. Overt deficiencies: covert= hidden- anemia exists as a covert condition, overt symptoms= weakness, pallor, fatigue, headaches appear. Condensation vs. Hydrolysis reactions: condensation: create a water molecule. Hydrolysis: use a water molecule
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This note was uploaded on 04/01/2008 for the course NUTR 101 taught by Professor Folta during the Spring '08 term at Tufts.

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NutritionReview - Nutrition 101 Exam 1 Review Overview: Be...

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