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There are different biological explanations for anorexia nervosa. There are neural or
genetic explanations, which describe defects within the body, and the evolutionary
explanation. Neural explanations suggest that there is a problem in the brain which is
causing anorexia nervosa (AN). Some biological psychologists suggest that the problem is
linked to neurotransmitters in the brain, particularly serotonin and dopamine. Bailer et al
found high levels of serotonin in women with AN, the highest levels being in those with the
most anxiety.…read more

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Although the evolutionary model makes a great deal of sense, there is no empirical
evidence to back up the theory. The reproduction suppression account of AN does not
explain why AN would develop in men. According to recent statistics, 25% of adults with
eating disorders are male, suggesting that AN is not solely a female disorder and therefore
cannot be explain just in terms of the suppression of reproduction.…read more


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