Transcription of SNAC Cards B 10/17/05 2:30 PM Page 1 Calories
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SNAC Cards B 10/17/05 2:30 PM Page 1 Calories
SNAC Cards B 10/17/05 2:30 PM Page 1. Calories Count How Much Do You Know How Many Calories About Calories ? Do You Need? A calorie is the unit used to measure Calories contained in food are trans- the energy-producing value of food. formed into different kinds of work- Technically, a calorie is defined as the ing energy by metabolic reactions in amount of heat necessary to raise the the body: electrical for conduction of temperature of one gram of water nerve impulses, mechanical for mus- one degree centigrade. There are four cle contraction and move m e n t , major sources of energy in food: car- chemical for metabolic processes, bohydrate, protein, fat, and alcohol. and heat for maintenance of normal When burned (metabolized), they body temperature. Thus, two factors provide different amounts of energy: determine your calorie needs: 1) basal metabolic rate (BMR), Carbohydrate = 4 Calories per gram which is the energy needed to main- Protein = 4 Calories per gram tain your body's basic physiological Alcohol = 7 Calories per gram functions at rest, and 2) level of phys- Fat = 9 Calories per gram ical activity.
MAKING CALORIES COUNT Energy is defined as the capacity to do work. We get energy from the food we eat. More specifically, there are four sources that provide energy: carbohydrate, protein, fat, …
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