PSYCH 100 Lecture Notes - Lecture 24: Motivation, Homeostasis, Ghrelin
Document Summary
Psych 100 lecture 24 motives to eat. What drives us: motivation: process that causes movement toward a goal or away from an unpleasant situation, drive: internal state that arises in response to a need. Instinct: unlearned characteristic patterns of responding: homeostasis: body"s need to maintain balance (temperature, fluids, etc. ) Intrinsic versus extrinsic motivation: doing something because you enjoy it versus doing something because you get a reward. Motives to eat: set point: genetically influenced weight range that you will stay at when not trying to gain or lose weight, varies about 10% in either direction (set point of 150 pounds could weigh 135- 165 pounds: basal metabolism: rate at which body burns calories; fixed number of fat cells, hormones influence set point, heritability of set point is . 4 to . 7 in twin studies. Controlling our eating: brain is number one organ in determining hunger.
