Addiction

Addiction is a compulsion to repeat a behavior regardless of its consequences. A person who is addicted is sometimes called an addict.

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Many drugs or behaviors can precipitate a pattern of conditions recognized as addiction, which include a craving for more of the drug or behavior, increased physiological tolerance to exposure, and withdrawal symptoms in the absence of the stimulus. Most drugs and behaviors that directly provide either pleasure or relief from pain pose a risk of dependency. Addictions can also be formed due to opponent process reactions. For example the terror of jumping out of an airplane is rewarded with intense pleasure when the parachute opens. Because of opponent process criminal behavior, running, stealing, violence, acting, test taking can become habit forming.

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Drug: A drug is any substance that can be used to modify a chemical process or processes in the body, for example to treat an illness, relieve a symptom, enhance a performance or ability, or to alter states of mind. The word "drug" is etymologically derived from the Dutch/Low German word "droog", which me...

Behavior: Behavior (or behaviour) refers to the actions or reactions of an object or organism, usually in relation to the environment. Behavior can be conscious or unconscious, overt or covert, and voluntary or involuntary. Behavior is controlled by the endocrine system, and the nervous system. The complexity...

Physiological tolerance: In physiology, tolerance occurs when an organism builds up a resistance to the effects of a substance after repeated exposure. This can occur with environmental substances such as salt or pesticides. It is also commonly encountered in pharmacology, when a subject's reaction to a drug (such as a pa...

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Boy is Torn Between His Addiction to His Radio Set and the Bar of Black Jack Liquorice