Chapter 9 Notes from the book

Chapter 9 Notes from the book - Chapter 9 Notes from the...

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Chapter 9 Notes from the book Hunger and Sex The Biology of Hunger o Gastric Signals Every time Washburn reported hunger pangs, his stomach was also contracting. Therefore, a growling stomach needs food. Stomach tells brain how much nutrients are present. Rich food stops hunger faster than water. Hormone cholecystokinin (CCK) helps start digestion of food, travels to the brain through the bloodstream, and signals us to stop eating. o Blood Chemistry Three chemicals that play a role in hunger, eating and satiety (the state of feeling full)- glucose, insulin and leptin. Glucose (blood sugar)-Brain needs sugar for energy. Sugar receptors in brain (triggers hunger when sugar levels fall) and liver (stores excess sugar). Insulin-plays a role in glucose control. When we eat complex carbs (bread, pasta) insulin levels go up and fall gradually. When eating simple sugar they rise and fall sharply. Leptin-chemical substance released by fat cells, decreases food intake and increases energy expenditure or metabolism. Appears to act as an anti-obesity hormone o Brain Processes Hypothalamus-regulates important body functions, including hunger. Lateral hypothalamus-involved in stimulating eating. When destroyed a starving animal will show no interest in food. Ventromedial hypothalamus-involved in reducing hunger and restricting eating. When area destroyed animal eats profusely-becomes obese. Obesity The biology of Obesity o Genetic component-most likely to be obese if parents are also obese o Set Point-the weight maintained when the individual makes no effort to gain or lose weight. Determined in part by the amount of stored fat in the body. Psychological Factors in Hunger and Obesity o Emotional state and external stimuli-indulging when upset or something bad happens
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o Time and place affect eating-learned associations of food with a particular place and time are characteristics of many organisms. Associate watching TV with eating. o Evolution of food-food has changed since the beginning and we now snack on soft drinks and candy bars. o Dieting is a continuing obsession in the US Chapter 10 from the book Horney’s Sociocultural Approach o Karen Horney-stated that some of Freud’s most popular ideas were only hypotheses. Wanted observable data. o
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This note was uploaded on 07/20/2011 for the course PSYC 86-407 taught by Professor Vandellen during the Spring '08 term at University of Georgia Athens.

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Chapter 9 Notes from the book - Chapter 9 Notes from the...

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