Basal Metabolic Rate BMR The number of calories

Basal Metabolic Rate

BMR �The number of calories your body burns at rest to maintain normal body functions. �It is the amount of calories per day your body burns, regardless of exercise. �It changes with age, weight, height, gender, diet.

Essential Nutrients �Carbs �Fats �Proteins �Vitamins �Minerals �Water

Energy Sources �Carbs and Fats Body source of usable energy �Proteins Building block for proper body functio �Vitamins, Minerals and Water Not energy sources No Calories

Qualitative and Quantitative Nutritional Needs � Qualitative: variety of foods you need on a daily basis Proteins, carbohydrates, lipids, water, mineral and vitamins � Quantitative: amounts of different foods you need, number of grams/litres of food you should eat daily ▪ Varies on: ▪ ▪ Sex Height Weight (mass) Activity level Used to determine the amount of nutrients you should eat daily

�Energy supplied by food is measured in kilojoules (k. J) 1 g of protein = 16 k. J of energy (4 kcal/g) 1 g of carbohydrates = 16 k. J of energy (4 kcal/g) 1 g of lipids = 36 k. J of energy (9 kcal/g) �All foods supply energy first from carbohydrates, next lipids and finally from protein Most foods are compounds of all nutrients

Other Order Calories Fat (saturated fat) Carbs Protein Sodium Pizza Hut Meat Lover's Stuffed Crust Pizza (2 slices) 900 42 g (20 g) 86 g 42 g 2, 500 mg Taco Nachos Bell. Grande 780 43 g (13 g) 80 g 20 g 1, 300 mg Wendy's Chicken BLT Salad 710 30 g 36 g 1, 610 mg 47. 5 g (13 g) Sandwiches Calories Fat (saturated fat) Carbs Protein Sodium Arby's Roast Beef Sub 760 48 g (16 g) 47 g 35 g 2, 230 mg Subway 6" Double Meatball Marinara Sub 780 41 g (18 g) 61 g 35 g 1, 760 mg Order

Energy in Food �Calculate the energy released from each food by using this formula. � 4. 2 is the value of the specific heat capacity of water, in joules per gram per degree Celsius – the number of joules taken to raise the temperature of water by 1 °C. 1 cm 3 of water has a mass of 1 g. �If the number is more than 1000 J/g, express it as kilojoules (k. J): � 1 kilojoule = 1000 joules