evaluation of biological explanations

** Biological explanation focuses on neurotransmitters and on genetic differences. States people are predisposed to biological vulnerability making them susceptible to addiction in initiation stage. Predispositions not likely to have as much of an effect in maintenance stage. However, biological predisposition makes relapse likely. Also difficult to state which neurotransmitter produces what reward making their effects complex and not fully understood.

** Neurotransmitter most commonly implicated is dopamine. It has an effect on the physiological nsystems on cognition, mood and behaviour. Comings et al said neurotransmitters play a role in chemical addictions and behaviours…