PSY 111 1st Edition Lecture 30 Review What is anorexia nervosa and extreme phobia of gaining weight What symptoms are associated playing with food not eating lowered self esteem body dismorphic disorder What is bulimia nervosa binge eating and purging How are anorexia and bulimia different anorexia you eat bulimia you eat a lot Which is harder to diagnose bulimia Three theories of emotion instinct theory drives are biological drive reduction theory drive is like an itch pushes us to reduce need want to achieve homeostasis optimum arousal theory what about people who seek stimulation driven to maintain some level of arousal If you have excessive serotonin levels you re likely to be highly anxious and more persuaded to eat Which of the three theories of emotions apply to anorexia and bulimia o Anorexia drive reduction theory reduce the amount of serotonin in the brain their homeostasis is off o Bulimia drive reduction theory Biochemistry of hunger Hunger signals triggers in the brain when glucose levels drop Leptin a protein signals satiety o Released by fat cells in the body o Tells you when you are satisfied Hypothalamus regulates eating lets your body know you are pleasured by food Side note dissatisfaction increases anxiety Glucose vs fructose in the brain 20 participants half female Glucose affected by hypothalamus but fructose did not Glucose reduced brain activity associated with pleasure and hunger Fructose dis not impact theses regions Levels of leptin did not differ
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