Module 20 - Module20 22:10 Objective 20-2 Drugs alter...

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Module 20 22:10 Objective 20-2 Drugs alter consciousness by changing perceptions and moods Continued use of alcohol and other psychoactive drugs produces tolerance because the user experiences neuroadaptation- the brain adapts its chemistry to offset the drug effect As a body responds to the drugs absence, the user will go through withdrawal, feeling physical pain and intense cravings, indicating a physical dependence on the drug People can also develop psychological dependence, particularly for stress-relieving drugs Misconceptions about Addiction 1. addictive drugs quickly corrupt…morphine taken to control pain is powerfully addictive and often leaders to heroin abuse a. only 15-16% of people become addicted within 10 years of first use b. people don’t typically become addicted when using drugs medically 2. addictions cannot be overcome voluntarily; therapy is required a. Alcoholics Anonymous has supported many people in overcoming alcohol dependence, but people often recover on their own 3. the concept of addiction can cover not just drug dependencies, but also repetitive, pleasure-seeking behaviors claims of shopping addictions, food addictions, exercise addictions…it can become an excuse instead of an illness Objective 20-3 3 categories of psychoactive drugs o depressants, stimulants, and hallucinogens drugs in all 3 categories do their work at the brain’s synapses by stimulating, inhibiting, or mimicking the activity of neurotransmitters
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Objective 20-4 small doses of alcohol may enliven a drinker, but they do so by slowing brain activity that controls judgment and inhibitions when provoked people under alcohol’s influence respond more aggressively than usual when asked for help, people are more willing to help than usual it increases harmful tendencies (getting girls drunk to take advantage of them) but also increases helpful tendencies (when tipsy restaurant patrons leave extravagant tips) the urges you would feel if sober are the ones you will more likely act upon if intoxicated low does of alcohol relax the drinker by slowing sympathetic nervous system activity o with large doses, alcohol slow reactions, slurs speech, and deteriorates skilled performance o despite most people’s belief that driving under the influence is wrong and they would not do it…under the influence, their moral judgments become less mature
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Module 20 - Module20 22:10 Objective 20-2 Drugs alter...

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