-has a physical cause -an illness -either addicted or not -problem lies in the individual -addiction is irreversible
Biochemical - dopamine
Main neurotransmitters. If changed, blocked or replaced it will have an effect on mood - cognition behaviour and systems in the body
Neurotransmitter that affects motivation and pleasure.
>some substances (e.g, food, drugs) increase dopamine levels in the brain, either by increasing its production or preventing its reuptake at synapses (it doesn't get cleared up as quickly as usually)
>once dopamine is removed - the good, pleasurable, feeling disappears. More of the substance is needed to get the feeling back.
>A tolerance for dopamine is built up over time. (broken up and cleared up quicker) therefore more of the…