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__TOC__
 
== Acne: Words to Know ==
 
== Acne: Words to Know ==
      
; '''Androgen:'''
 
; '''Androgen:'''
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: An oily material produced by sebaceous glands that keeps the skin moist.
 
: An oily material produced by sebaceous glands that keeps the skin moist.
 
; '''Tretinoin:'''
 
; '''Tretinoin:'''
: A drug that increases the rate at which skin cells are formed and die.</div>
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: A drug that increases the rate at which skin cells are formed and die.
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== Addiction: Words to Know ==
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; '''Detoxification:'''
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: Withdrawal; the process by which a person gives up a substance or activity to which he or she has become addicted.
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; '''Impairment:'''
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: An inability to carry on normal everyday functions because of an addiction.
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; '''Methadone:'''
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: A chemical given to addicts to help them overcome their addiction to heroin.
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; '''Physiological dependence:'''
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: A condition in which a person's body requires certain behaviors or the intake of some substance, without which it will become ill.
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; '''Process addiction:'''
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: A condition in which a person is dependent on some type of behavior, such as gambling, shopping, or sexual activity.
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; '''Psychological dependence:'''
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: A condition in which a person requires certain activities or the intake of some substance in order to maintain mental stability.
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; '''Substance addiction:'''
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: A condition in which a person is dependent on some chemical substance, such as cocaine or heroin.
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; '''Tolerance:'''
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: The ability of a body to endure a certain amount of a substance that had previously been too much for it to tolerate.
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; '''Twelve-step program:'''
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: A plan for overcoming an addiction by going through twelve stages of personal development.
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; '''Withdrawal:'''
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: The process by which a person adjusts to the absence of some substance or activity to which he or she has become addicted.