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Copyright © 2001 by Harcourt, Inc. All rights reserved. Consciousness and Drugs.

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Presentation on theme: "Copyright © 2001 by Harcourt, Inc. All rights reserved. Consciousness and Drugs."— Presentation transcript:

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2 Copyright © 2001 by Harcourt, Inc. All rights reserved. Consciousness and Drugs

3 Copyright © 2001 by Harcourt, Inc. All rights reserved. Drugs and Consciousness Psychoactive Drug –a chemical substance that alters perceptions and alters mood, and sometimes alters behavior

4 Copyright © 2001 by Harcourt, Inc. All rights reserved. Physical dependence Tolerance –diminishing effect with regular use of the same dose of a drug Withdrawal –discomfort and distress that follow discontinued use of a psychoactive drug After repeated exposure, more drug is needed to produce same effect Drug dose Drug effect Response to first exposure

5 Copyright © 2001 by Harcourt, Inc. All rights reserved. Types of drugs –Based on their effects (in the CNS) –Quiz: barbiturates, nicotine, heroin, Ecstasy, methylphenidate, oxycontin, diet pills, “magic mushroom,” solvents, Xanax

6 Copyright © 2001 by Harcourt, Inc. All rights reserved. Depressants Reduce neural activity and slow body functions –Alcohol Bar study (video) –Barbiturates –Opiates opium and its derivatives (morphine and heroin) depress neural activity, temporarily lessening pain and anxiety

7 Copyright © 2001 by Harcourt, Inc. All rights reserved. Molecular Similarity of Opiates & Endorphins

8 Copyright © 2001 by Harcourt, Inc. All rights reserved. Molecular Similarity of Opiates & Methadone

9 Copyright © 2001 by Harcourt, Inc. All rights reserved. Stimulants Drugs that excite neural activity and speed up body functions caffeine, nicotine, amphetamines

10 Copyright © 2001 by Harcourt, Inc. All rights reserved. The physiological effects of nicotine

11 Copyright © 2001 by Harcourt, Inc. All rights reserved. Cocaine Euphoria and Crash

12 Copyright © 2001 by Harcourt, Inc. All rights reserved. Hallucinogens –drugs that distort perceptions and evoke sensory images (in the absence of sensory input)

13 Copyright © 2001 by Harcourt, Inc. All rights reserved. Hallucinogens LSD –lysergic acid diethylamide (acid) Shrooms PCP THC –active ingredient in marijuana –triggers a variety of effects, including mild hallucinations

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