Across
- 2. Researcher who used brain imaging and Ritalin studies
- 5. Researcher who reviewed adoption studies in 2008
- 7. Reduction in receptor numbers after repeated stimulation
- 8. Gene linked to dopamine receptor A1 variant
- 11. Researcher who found high concordance in MZ twins
- 15. Non-genetic influences interacting with genes
- 16. STUDY, Study comparing adopted children to biological parents
- 18. Researcher associated with the Virginia twin study
- 19. Process by which pleasurable behaviours are strengthened
- 20. Drug used to investigate dopamine receptor availability
- 21. PATHWAY, Alternative name for the mesolimbic pathway
- 24. Reduced effect requiring increased substance use
- 25. Toxic intermediate product in alcohol metabolism
- 27. Section evaluating competing explanations
- 28. Neurotransmitter central to the reward pathway
- 29. CORTEX, Brain region involved in impulse control and relapse
- 30. Idea that addiction results from genes and environment working together
Down
- 1. Continued engagement despite reduced pleasure
- 3. Strength of biological explanation in reducing blame
- 4. Extent to which variation is due to genes
- 6. Enzyme converting ethanol into acetaldehyde
- 9. Proteins that dopamine binds to
- 10. Explanation involving culture and social status
- 12. Biological transmission of traits
- 13. First stage of addictive behaviour
- 14. STUDY, Study comparing identical and non-identical twins
- 17. Brain changes following repeated substance use
- 22. Enzyme converting acetaldehyde into acetate
- 23. Dopamine pathway strongly implicated in addiction
- 26. Chemical produced after acetaldehyde is broken down