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Questions and Answers
What characterizes antagonist drugs in terms of neurotransmitter action?
What characterizes antagonist drugs in terms of neurotransmitter action?
- They have no effect on neurotransmitter action.
- They reduce the action of neurotransmitters. (correct)
- They increase the action of neurotransmitters.
- They enhance the effects of neurotransmitters.
Which classification of psychoactive drugs is primarily known for increasing bodily processes?
Which classification of psychoactive drugs is primarily known for increasing bodily processes?
- Stimulants (correct)
- Depressants
- Opiates
- Hallucinogens
According to the DSM-5 criteria, how many criteria must be met to be classified with a substance use disorder?
According to the DSM-5 criteria, how many criteria must be met to be classified with a substance use disorder?
- Three or more
- Four or more
- Two or more (correct)
- One or more
What is one consequence of physical dependence on a drug?
What is one consequence of physical dependence on a drug?
Which of the following is a characteristic effect of hallucinogens?
Which of the following is a characteristic effect of hallucinogens?
Flashcards
Agonist drug
Agonist drug
A drug that enhances the action of a neurotransmitter at the synapse.
Tolerance (drug)
Tolerance (drug)
Diminished response to a drug after repeated use.
Depressant drug
Depressant drug
A drug that slows down bodily processes.
Substance use disorder
Substance use disorder
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Antagonist drug
Antagonist drug
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Study Notes
Drug Actions and Effects
- Drugs primarily influence synaptic transmission.
- Agonists enhance neurotransmitter activity.
- Antagonists reduce neurotransmitter activity.
Psychoactive Drug Categories
- Depressants: Suppress bodily functions.
- Examples: Alcohol, Valium
- Opiates: Act as pain relievers (analgesics).
- Examples: Morphine, Heroin
- Stimulants: Increase bodily functions.
- Examples: Methamphetamine, Cocaine
- Hallucinogens: Cause sensory distortions.
- Examples: LSD, Cannabis
Substance Use Disorders (DSM-5 Criteria)
- Characterized by two or more of these criteria:
- Hazardous use
- Social/interpersonal issues related to use
- Neglecting major responsibilities
- Tolerance
- Withdrawal
- Using more than intended or for longer periods
- Repeated attempts to quit or control use
- Reduced social, recreational, or occupational involvement
- Significant time spent obtaining the substance
- Physical or psychological problems due to use
- Cravings
Physical Dependence: Tolerance
- Tolerance occurs when repeated drug use reduces the drug's effects.
- This involves:
- Reduced receptor numbers
- Reduced receptor binding efficiency
- Decreased receptor responsiveness
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