NUT 10 Chapter Notes - Chapter 3: Nutrition Facts Label, Calorie, Basal Metabolic Rate
Document Summary
Chapter 3: calories the energy basis of nutrition. 1 calorie= heat to raise 1 liter of water by 1 degree celsius. Food + oxygen -> breaks down chemical bonds, releases energy, releases co2. Bomb calorimeter -measures the heat given off and the water heating up. Potential energy of macronutrients: carbohydrates: 4. 2 kcal/gram, fat: 9. 4 kcal/gram, protein: 5. 7 kcal/gram. The amount of energy that is physiologically available to use from the macronutrients is slightly lower: carbohydrates: 4 kcal/gram, fat: 9 kcal/gram, protein: 4 kcal/gram. Calculating calorie values: note the number of grams of carbohydrates, fat, and proteins, multiply each by its respective physiological fuel value, add up the resulting products to get the total available energy, to get percentage of calories: Divide the number of nutrient calorie by the total calories and multiple by 10 to get a percent. Water, cholesterol, vitamins, minerals, and fibers do not have calories. Daily energy reflects on: basal metabolic rate (bmr)
