http//…Use web…Use website about to answer questions belowScreen 9: Alcohol and Barbiturates – How does alcohol change the brain’s functioning? Screen 13: Mechanisms of Drug Addiction – What leads a person to move from the casual or recreational use of a drug to a state of addiction, in which the person experiences a powerful craving for the drug that begins to dominate his or her life?Screen 16: Addiction Experiment – What type of injection would you predict to be more pleasurable for the rat? Would the location of the injection make a difference?Screen 17: Results of Addiction Experiment – What conclusions did you draw from the rat’s behavior? Screen 18: Understanding and Treating Addiction – Why can some people use a drug in moderation for years, while others move quickly from casual use to a full-blown addiction?