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1. The high amounts of the COMT gene is linked to a decrease in OCD,why?

  • increases dopamine
  • because it terminates the action of dopamine which can cause the obsession through overactivity
  • decreases serotonin
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2. give the 3 main psychological explanations of ocd?

  • develpomental, cognitive, psychodynamic
  • behavioural, cognitive, psychodynamic
  • behavioural, psychological,cognitive

3. give an example of physiological evidence to support OCD being biological?

  • PET scan showed that people with OCD have an increased metabolism of glucose in the OFC loop of the brain
  • a decrease in glucose metablolism in the brain when experiencing ocd

4. name an alternative gene to the COMT gene and what it showed?

  • the SAPAP3 gene which showed and increase in grooming with mice
  • the SAPAP gene showing a decrease in mice grooming themselves

5. give a strategy which has developed as an evolutionary adapatation

  • hoarding
  • harm avoidance strategy
  • cleaning


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