HUN2201 Chapter Notes - Chapter 13: Peptide Yy, Ghrelin, Sympathetic Nervous System

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15 Nov 2016
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Energy balance: fluctuations in weight depend on: Energy intake and energy expenditure: energy balance equation. Energy intake is kcal from food, beverages. Energy expenditure is energy expended at rest and during physical activity. Energy intake: calculating the energy that is in a particular food. Alcohol is 7 kcal/g: 1 cup of quick oatmeal has 142 kcal. 6 grams protein 4 kcal/gram = 24 kcal. 25 grams carbohydrate 4 kcal/gm = 100 kcal. 2 grams fat 9 kcal/gram = 18 kcal. Total kcal = 24 kcal + 100 kcal + 18 kcal = 142 kcal. Energy expenditure: energy is expended to maintain basic body functions and to perform activities, total 24-hour energy expenditure is composed of three components: Energy cost of physical activity: direct calorimetry is a method that measures the amount of heat the body releases. Indirect calorimetry estimates energy expenditure by measuring oxygen consumption and carbon dioxide production: thermic effect of food (tef)

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