Chapter 33 The Nervous System.pdf
Chapter 33 The Nervous System.pdf
Chapter 33 The Nervous System.pdf
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<strong>Chapter</strong> <strong>33</strong><strong>Nervous</strong> <strong>System</strong><strong>33</strong>.4 Effects of DrugsHow Drugs Work• A drug is a substance, natural or artificial,that alters the function of the body.