PSYC 271 Study Guide - Final Guide: Monoamine Neurotransmitter, Active Ingredient, Mental Disorder
23 Feb 2017
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Chapter 12, 13, and 14- motivation (hunger, reproduction, and sleep) In order to function, humans must convert organic material into chemical energy which is stored within the body. Theories fall into two different categories: set-point theories, positive incentive theories. Hunger is a response to an energy deficit, thus, eating is a mean to maintain an energy set point. Once you deviate from the set-point value, you take in food to return to optimal levels. The meal continues until the energy level returns to its set point and the person feel satiated. Negative-feedback system- feedback from changes in one direction elicit compensatory effects on the opposite direction (act to maintain homeostasis) Lipostatic theories: fat stores determine how much we eat over long term (explains why weight is constant: long-term energy-storage indicator: long-term regulation, long-term eating trends to maintain a specific lipostatic set point. Inconsistent with evolutionary pressures related to eating: cannot explain eating disorders (anorexia, binge-eating, obesity)
