1. Section 4.2 Eating Disorders Slide 1 of 15 NASA was considering sending canaries into space to study them under zero gravity. The project was scrapped when someone realized that in spite of having sufficient water supplies, they could die of dehydration within a few hours. Why? Birds unlike humans need gravity to swallow. Humans can swallow even while hanging upside down.

2. Section 4.2 Eating Disorders Slide 2 of 15 Objectives Identify health risks associated with anorexia. Explain the relationship between bulimia and dieting. Section 4.2 Eating Disorders List the main health risks of binge eating disorder.

3. Section 4.2 Eating Disorders What might cause someone to develop an eating disorder? Slide 3 of 15

4. Section 4.2 Eating Disorders Slide 4 of 15 Myth Eating disorders affect only females. Fact Eating disorders affect females more than males, but males do develop eating disorders. Because of this myth males are even less likely than females to seek help for an eating disorder. What factors other than gender might keep someone from seeking help for an eating disorder?

5. Section 4.2 Eating Disorders Slide 5 of 15 An eating disorder is a mental disorder that reveals itself through abnormal behaviors related to food. Anorexia Nervosa A person with anorexia nervosa doesn’t eat enough food to maintain a healthy body weight.

6. Section 4.2 Eating Disorders Slide 6 of 15 A person with anorexia can starve to death. Anorexia Nervosa Health Risks In some cases, a lack of essential minerals causes the heart to stop suddenly, leading to death.

7. Section 4.2 Eating Disorders Slide 7 of 15 The lack of a chemical that regulates mood is one possible cause of anorexia. Anorexia Nervosa Other possible causes are low self-esteem and a strong desire to please others. Possible Causes

8. Section 4.2 Eating Disorders Slide 8 of 15 Doctors, nurses, and dietitians work together to stop the weight loss and change a person’s eating habits. Anorexia Nervosa At the same time, mental health experts work with the patient and family members to address the underlying emotional problems. Treatment

9. Section 4.2 Eating Disorders Slide 9 of 15 People who have bulimia go on uncontrolled eating binges followed by purging, or removing, the food from their bodies. Bulimia Most people with bulimia may suffer from dehydration, kidney damage, and a lack of necessary vitamins and minerals. Health Risks Bulimia may begin in connection with a diet, but the person soon becomes unable to stop the cycle of binging and purging. Possible Causes People who have bulimia are aware of what they are doing, but they are unable to control their behavior. Treatment

10. Section 4.2 Eating Disorders Slide 10 of 15

11. Section 4.2 Eating Disorders Slide 11 of 15 People with binge eating disorder regularly have an uncontrollable urge to eat large amounts of food. Binge Eating Disorder They usually do not purge after a binge. Health Risks The main physical risks of binge eating disorder are excess weight gain and unhealthy dieting. Possible Causes Some people use binge eating to avoid dealing with difficult emotions, such as anger, or with stressful situations. Treatment People with binge eating disorder need help in learning how to control their eating. They often need to address underlying emotional problems.

12. Section 4.2 Eating Disorders Slide 12 of 15 Vocabulary eating disorderA mental disorder that reveals itself through abnormal behaviors related to food. anorexia nervosaAn eating disorder in which a person doesn’t eat enough food to maintain a healthy body weight. bulimiaAn eating disorder in which a person has uncontrolled eating binges followed by purging. binge eating disorder An eating disorder in which a person regularly has an uncontrollable urge to eat large amounts of food, but without purging.

13. Section 4.2 Eating Disorders Key Ideas and Vocabulary 1.What is an eating disorder? Slide 13 of 15 Mental disorder that reveals itself through abnormal behaviors related to food. 2.What health risks are associated with anorexia? Risks include starvation and cardiac arrest. 3.What is bulimia? Explain the connection between bulimia and dieting. 4.What health risks are possible for someone with binge eating disorder? Bulimia is characterized by uncontrollable eating followed by purging. Purging is used to lose or maintain weight. Excess weight gain and unhealthy dieting.