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Psychology Essay The Biological Model The biological model views abnormally behaviour as caused by biological factors. The biological factors associated with mental illness usually affect the brain in one way or another. A specific disorder that is caused by brain damage or malfunction is Alzheimer's disease . When searching for causes of mental illness, people who consult the biological model look to the following causes of illness: The first one being biochemical factors; An excess or deficiency in the chemical elements in the body, especially in the brain, has been shown to be a possible cause of some mental disorders. There are many neurotransmitters in the brain and a chemical imbalance in a few of the known ones is believed to be associated with abnormal behaviour The second factor is genetics; Some conditions such as depression, schizophrenia and alcoholism are believed to be caused in party by genetic factors. The diathesis-stress theory states...

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