Lucy Miller - As we learned in Discussion 1 this week, this 20-year-old college student has recently been diagnosed with bipolar disorder. As a coping mechanism for her wild mood changes, Lucy began experimenting with illegal drugs while still in high school and has now become addicted to them. Analyze the biology of substance abuse and describe its potential for dependence in certain families and the outcomes of various behaviors. Is it likely that Lucy, Josh, or Sam had a genetic predisposition to alcohol or substance addition? How does lifespan development make a difference in propensity to abuse substances? How does the stage of life at which the abuse begins impact the user's behaviors?