Biological explanation of OCD

The view that physical and psychological characteristics are determined by the behaviour of the ________ through neurons

• genes

  (genetic explanation)

• the nervous system (neural explanation)

________ make up chromosomes and consist of DNA which codes the physical features of an organism

• genes

  (genetic explanation)

• the nervous system (neural explanation)

Lewis found that it is genetic vulnerability for OCD that is passed on, not the certainty of OCD

• true

• false

diathesis stress model means...

• the OCD is a result of both genes and the nervous system

• some genes need enviromental triggers to be expressed e.g. trauma

• some types of stress can damage genes

• the nervous system is faulty

what would not be considered an environmental stressor?

• eating breakfast

• getting fired from a job

• a loved one dying

• getting married

The genes which create vulnerability for OCD are called ______ genes

OCD seems to be polygenic. This means that OCD is not caused by one single gene but by a combination of genetic variations that together significantly increase vulnerability

• true

• false

Only one type of gene is involved in OCD, the 5HTI-D beta gene

• true

• false

all types of OCD are the same and so they all have the same genetic components

• true, there is only one true form of OCD

• false, there are other forms e.g. hoarding disorder

The genes associated with OCD are likely to affect the levels of key neurotransmitters as well as structures of the brain.

• true

• false