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 (a)   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