PSYC 1002 Lecture Notes - Lecture 10: Bulimia Nervosa, Anorexia Nervosa, Motivation
Document Summary
Nelson mandela-27 yrs in prison, came out president of africa. Motives: needs, wants, desires leading to goal-directed behavior (biological&social) Drives: internal tension that pushes us to reduce that tension to achieve homeostasis. Intrinsic motivation: internal factors such as self-determination, curiosity,challenge,effort. inherently interesting/enjoyable. When extrinsic reward consists of praise->enhances motivation. But, evolutionary approach suggests we should all be similarly motivated. Basic human needs must be satisfied before higher needs can be met. Correlation bw occurrence of stomach contraction & feelings of hunger. Gastric activity signals both hungry and full. Cannon & washburns conclusions: gastric activity the basis for hunger. But not only basis for hunger, even if stomach removed people feel hungry. Glucose(blood sugar) receptors in brain & liver: hungry if low. Insulin released from pancreas causes excess sugar to be stored as fats and carbohydrates. Leptin protein in fat cells decreases food intake and increases energy expenditure. Ghrelin released by stomach & creates feelings of hunger through hypothalamus.
