26. Reward Pathway, Dopamine, and You: An Overview Right hand Picture: http://molinterv.aspetjournals.org/content/vol3/issue5/images/large/WolfFig1.jpeg
27. Reward Pathway, Dopamine, and You: An Overview Right hand Picture: http://www.nida.nih.gov/NIDA_notes/NNvol21N2/craving.html
54. Mode of Action: Nicotine Nicotine Right Hand Picture: http://whttp://www2.csusm.edu/DandB/Nicotine.htmlww.islandcounty.net/health/images/receptor3.jpg