nutrition+homework

1. What is the rationale behind using BMI to judge obesity? The rationale is it takes into consideration height and weight to figure out how much of body fat you have to calculate weather or not you are obese. The system is not fail proof however as a weight lifter would have a really high BMI but not have any body fat.

2. What disorders are associated with obesity? Diabetes type two, hypertension, cardiovascular disease, stroke, gallbladder disease, respitory dysfunction, osteoarthritis and certain kinds of cancers. 3. Why might carbohydrates be the cause of the obesity epidemic today? Because carbohydrates can be refined and the majority of the good parts of carbohydrates are taken away when this happens so only starch remains. 4. Why might fats be the cause of the obesity epidemic today? Unsaturated fatty acids that are hydrogenated to produce a solid fat are found in many snack foods and unhealthy processed food products. Trans fats could be a cause of the obesity epidemic because it is more commonly found in foods now and is extremely unhealthy. 5. What types of fats are dangerous to our health? Trans fats, saturated fat 6. What type of fat is protective for cardiovascular disease? Unsaturated fats 7. Proteins provide the essential amino acids; why shouldn't they be eaten as an energy source? Excessive protein can cause kidney stones also increase calcium los in urine. Lots of protein rich foods are heavy in saturated fats which can leads to cardiovascular disease. Carbohydrates are also apart of a balanced diet and should always be eaten.

8. What is the chief contribution of each of these in the body -- carbohydrates, proteins, fats, fruits, vegetables? Carbohydrates – give energy to the brain, good source of vitamins, minerals and fiber Proteins – contain all nine essential amino acids which are needed for children to grow Fats – omega 3 fatty acids are protective against heart disease, polyunsaturated oils contain linoleic acid which is an acid the body cannot make Fruits – Vitamins C, E and A protect the body against free radicals Vegetables – can reduce your risk of heart disease, full of essential vitamins, minerals and fiber 9. In general, what does the USDA food pyramid tell you? To eat a variety of foods including; grains, vegetables, fruits, milk and meat and beans 10. Name and describe four eating disorders. Anorexia nervosa – people who think there fat even though they are underweight Bulimia nervosa – people who binge eat a ton of calories and then throw their food up. Muscle dysmorphia – people who think they are not strong enough and spend too much time lifting weights, hours a day at the gym Binge eating disorder – people who binge eat and do not purge the food they take in