Chapter 3 Part 2 - Bremerton Schools 3 Part 2: Tolerance, dependence, ... Addiction is no different...
Transcript of Chapter 3 Part 2 - Bremerton Schools 3 Part 2: Tolerance, dependence, ... Addiction is no different...
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Consciousness and the
Two-Track Mind
Chapter 3 Part 2:Tolerance, dependence,
addiction, & types of drugs
Unit 5 ~ AP Psychology ~ Ms. Justice
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12: What are tolerance, dependence, and addiction, and what are some common
misconceptions about addiction?
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Drugs and Consciousness
Psychoactive Drug: A chemical substance that alters
perceptions and mood (affects consciousness).
Psychoactive drugs are divided into three groups:
1. Depressants
2. Stimulants
3. Hallucinogens
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Dependence & Addiction
Continued use of a psychoactive drug produces tolerance.
With repeated exposure to a drug,
the drug’s effect lessens. Thus it takes greater quantities to
get the desired effect.
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Withdrawal & Dependence
Withdrawal: Upon stopping use of a drug (after addiction), users may experience the undesirable effects of withdrawal.
Dependence: Absence of a drug may lead to a feeling of physical pain, intense cravings (physical dependence), and negative emotions (psychological dependence).
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Misconceptions About Addiction
1. Addictive drugs quickly corrupt.
2. Addiction cannot be overcome voluntarily.
3. Addiction is no different than repetitive pleasure-seeking behaviors.
Addiction is a craving for a chemical substance, despite its adverse consequences (physical &
psychological).
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13: What are depressants, and what are their effects?
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Depressants
Depressants are drugs that reduce neural activity and slow body functions. They include:
1. Alcohol
2. Barbiturates
3. Opiates
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Depressants
1. Alcohol affects motor skills, judgment, and memory…and increases aggressiveness while reducing self awareness.
Drinking and driving can produce disastrous results.
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Excessive alcohol consumption can shrink the brain, especially in women.
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Depressants
2. Barbiturates: Drugs that depress the activity of the central nervous system, reducing anxiety but impairing memory and judgment. Nembutal, Seconal, and Amytal are some examples.
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Depressants
3. Opiates: Opium and its derivatives (morphine and heroin) depress neural activity, temporarily lessening pain and anxiety. They are highly addictive.
When repeatedly flooded with an artificial opiate, the brain eventually stops producing its own opiates, endorphins, which can lead to overdose to relieve pain.
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14: What are stimulants, and what are their effects?
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StimulantsStimulants are drugs that excite neural activity and speed up body functions. Examples of stimulants are:
1. Caffeine
2. Nicotine
3. Cocaine
4. Ecstasy
5. Amphetamines
6. Methamphetamines
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Caffeine & Nicotine
Caffeine and nicotine increase heart and breathing rates and other autonomic functions to
provide energy.
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Why Do People Smoke?
1. People smoke because it is socially rewarding.
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Why Do People Smoke?
3. Nicotine takes away unpleasant cravings (negative reinforcement) by triggering epinephrine, norepinephrine, dopamine, and endorphins.
4. Nicotine itself is rewarding (positive reinforcement).
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Cocaine
Cocaine induces immediate euphoria followed by a crash. Crack, a form of cocaine, can be smoked. Other forms of
cocaine can be sniffed or injected.
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Ecstasy
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amine (MDMA) is a stimulant and mild
hallucinogen. It produces a euphoric high and can
damage serotonin-producing neurons, which results in a
permanent deflation of mood and impairment of memory.
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15: What are hallucinogens, and what are their effects?
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Hallucinogens
Hallucinogens are psychedelic (mind-
manifesting) drugs that distort perceptions and
evoke sensory images in the absence of sensory
input.
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Hallucinogens
1. LSD: (lysergic acid diethylamide) powerful hallucinogenic drug that is also known as acid.
2. THC (delta-9-tetrahydrocannabinol): is the major active ingredient in marijuana (hemp plant) that triggers a variety of effects, including mild hallucinations.
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Drugs
Summary
Table 3.3, page 123
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16: Why do some people become regular users of consciousness-
altering drugs?
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Influences on Drug Use
The graph below shows the percentage of US high-school seniors reporting their use of alcohol, marijuana,
and cocaine from the 1970s to the late 1990s.
Figure 3.22, p. 124
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Influences on Drug Use
The use of drugs is based on biological, psychological, and social-cultural influences.
Figure 3.23, page 125
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Marijuana Use
The use of marijuana in teenagers is directly related to the “perceived risk” involved with the drug.
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Influence for Drug Prevention and Treatment
1. Education about the long-term costs
2. Efforts to boost people’s self-esteem and purpose
3. Attempts to modify peer associations and teaching refusal skills
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17: What are near-death experiences, and what is the
controversy over their explanation?
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After a close brush with death, many people
report an experience of moving through a dark
tunnel with a light at the end. Under the influence of hallucinogens, others
report bright lights at the center of their field
of vision.
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