Insanity and Chemicals Free Essay

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Insanity and Chemicals

Mental disorders are changes in thinking, mood or behavior that cause distress and interfere with a person's ability to function. As with heart disease and cancer, they arise from a mixture of influences — heredity, biology and environment. Heredity is conveyed through genes, a set of instructions within cells that direct the manufacture of every structure of the human body. Some genes are expressed in great amounts throughout the life span, while others are tightly controlled or lie dormant unless stimulated. Probably no single gene for a specific mental disorder exists, but a composite of genes may cause an exaggerated response to stress, an increased susceptibility to depression, or a tendency to become dependent on alcohol. Su

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