Lecture 1: animals models of addiction because more legal, can do more stuff to rats than on humans (legal) What about behavioral addiction: gambling, sex, internet, video games, food, exercise, work. As a population we all increased in weight. ?black and hispanics overweight compared to other races, gender is equal. Influences on addiction: social/cultural, biological: genetics, family dynamics, psychodynamic: Why can some take alcohol but still no addiction: there are genetic factors, twin studies show that addiction in them are similar. Whether you like gambling, drinking, ect: gene aldh2 glu504lys: the byproduct makes you feel hangover (this enzyme breaks down the byproduct) If you don"t have a lot of this gene, you are more likely to drink more: chrna5/a3?b4: breakdown the byproduct (smoking) If parent alcoholic and not abusive then likely won"t get addicted. If parent don"t drink but abusive, child will likely use drugs and alcohol.