1. NUTRITION

2. Why Eat Food? Every cell must have energy to survive. That energy comes from the food we eat. The quality of the molecules in the food will determine the quality of the functioning of the cell. Every cell must have energy to survive. That energy comes from the food we eat. The quality of the molecules in the food will determine the quality of the functioning of the cell. We need food for energy, growth, repair and reproduction. The nutrients found in food give us the energy and building materials for the body. We need food for energy, growth, repair and reproduction. The nutrients found in food give us the energy and building materials for the body. A nutrient is any substance that has a useful function when taken up by body cells. A nutrient is any substance that has a useful function when taken up by body cells.

3. Food Energy The energy of food is measured in joules (J). If you are talking about a lot of energy you may wish to use the kilojoule (kJ) which is equal to 1000J. The energy of food is measured in joules (J). If you are talking about a lot of energy you may wish to use the kilojoule (kJ) which is equal to 1000J. The calorie (Cal) is another unit often used to express energy but it addresses heat energy. One calorie is enough heat energy to increase one gram of water by one degree Celsius. The calorie (Cal) is another unit often used to express energy but it addresses heat energy. One calorie is enough heat energy to increase one gram of water by one degree Celsius. 1 Cal = 4.1855kJ.

4. Battle of the Nutrients Nutrients can be broken down into two major groups - macronutrients and micronutrients. Nutrients can be broken down into two major groups - macronutrients and micronutrients. Macronutrients are consumed in large amounts on a daily basis. Macronutrients include the carbs, lipids and proteins. Macronutrients are consumed in large amounts on a daily basis. Macronutrients include the carbs, lipids and proteins. Micronutrients are consumed in smaller quantities and include vitamins and minerals. Micronutrients are consumed in smaller quantities and include vitamins and minerals.

5. Macronutrients Carbohydrates Sugars and starches. Sugars and starches. Major source of energy. Major source of energy. Found in breads, cereals and pasta. Found in breads, cereals and pasta. Cellulose acts as roughage in humans but not in all species. Cellulose acts as roughage in humans but not in all species.Lipids/Fats Triglycerides and fatty acids. Triglycerides and fatty acids. Used in phospholipids. Used in phospholipids. Cushions exposed areas and joints. Cushions exposed areas and joints. Concentrated sources of energy but secondary to the carbs. Concentrated sources of energy but secondary to the carbs.Proteins Structural and functional purposes. Structural and functional purposes. Found in abundance in meats and fish. Found in abundance in meats and fish. Amino acids – 8 of them are essential – must be in diet. The body can build the other 12 using them. Amino acids – 8 of them are essential – must be in diet. The body can build the other 12 using them.

6. Micronutrients Vitamins Small molecules containing C,H,O & N. Small molecules containing C,H,O & N. Many act as coenzymes that assist enzymes in carrying out vital chemical reactions. Many act as coenzymes that assist enzymes in carrying out vital chemical reactions. There are fat-soluble (locked in) and water (peed out) soluble vitamins. There are fat-soluble (locked in) and water (peed out) soluble vitamins.Minerals Inorganic compounds required by the body. Inorganic compounds required by the body. Iron – hemoglobin/red blood cells. Iron – hemoglobin/red blood cells. Calcium – bones & teeth. Calcium – bones & teeth. Lost in sweat and urine. Lost in sweat and urine. Plants are a good source – gained from the soil. Plants are a good source – gained from the soil.

7. Water Found in cytoplasm, extracellular fluid and major component of blood and sweat. This accounts for a lot of the material in our body. Found in cytoplasm, extracellular fluid and major component of blood and sweat. This accounts for a lot of the material in our body. Hydrolytic and dehydration synthesis reactions use water. Hydrolytic and dehydration synthesis reactions use water. Water has a high specific heat capacity which allows it to be of great assistance in the regulation of our body temperature – you have to keep the proteins happy! Water has a high specific heat capacity which allows it to be of great assistance in the regulation of our body temperature – you have to keep the proteins happy! Water is gained through drinking. Water is gained through drinking. Water is lost through sweat, urine and breathing (exhaling). Water is lost through sweat, urine and breathing (exhaling).

8. Anorexia & Bulimia Both are medical/psychological disorders centered around eating patterns and body image. Both are medical/psychological disorders centered around eating patterns and body image. More common in adolescent females than males. More common in adolescent females than males. Anorexia nervosa – Don’t eat much ever. Anorexia nervosa – Don’t eat much ever. Bulimia – Alternates between periods of starving and binge eating. Bulimia – Alternates between periods of starving and binge eating. Causes are thought to be combination of genetics, social factors and environmental conditions. Causes are thought to be combination of genetics, social factors and environmental conditions. Most patients with these disorders are helped through interventions and removal from regular social/environmental settings to be “reprogrammed” and educated. Most patients with these disorders are helped through interventions and removal from regular social/environmental settings to be “reprogrammed” and educated.

9. Effects of Anorexia

10. Effects of Bulimia

11. That’s All I Got!...