CASAC Foundations of Alcohol and Substance Use Disorders 4 — Questions and Answers
Question 1: Which neurotransmitter system is most directly implicated in the reinforcing effects of opioids?
- Serotonergic system
- Mesolimbic dopamine system (Correct answer)
- Cholinergic system
- GABAergic system
Correct answer: Mesolimbic dopamine system
Opioids stimulate mu-opioid receptors in the ventral tegmental area, causing dopamine release in the nucleus accumbens, which mediates reward and reinforcement.
Question 2: A client reports that they need three times their original alcohol dose to feel the same effect. This phenomenon is best described as:
- Cross-tolerance
- Pharmacodynamic tolerance (Correct answer)
- Sensitization
- Metabolic tolerance
Correct answer: Pharmacodynamic tolerance
Pharmacodynamic tolerance occurs when the CNS adapts to chronic drug exposure, requiring higher doses to achieve the same effect at the receptor level.
Question 3: According to the disease model of addiction, which statement is most accurate?
- Addiction results solely from moral failure and lack of willpower
- Addiction is a chronic brain disorder with genetic, environmental, and developmental components (Correct answer)
- Addiction is primarily caused by peer pressure and social environment
- Addiction can be permanently cured with a single treatment episode
Correct answer: Addiction is a chronic brain disorder with genetic, environmental, and developmental components
The disease model, supported by ASAM and NIDA, defines addiction as a chronic brain disorder influenced by genetics, environment, and development.
Question 4: Which of the following best describes the concept of 'kindling' in the context of alcohol withdrawal?
- The initial pleasurable sensation of alcohol intoxication
- Progressive worsening of withdrawal symptoms with repeated detoxifications (Correct answer)
- The process by which alcohol ignites dopamine release
- Tolerance development to sedative effects of alcohol
Correct answer: Progressive worsening of withdrawal symptoms with repeated detoxifications
Kindling refers to the neurological phenomenon where repeated alcohol withdrawals lead to increasingly severe withdrawal symptoms, including higher seizure risk.
Question 5: A person who uses heroin and then experiences severe withdrawal when trying to quit most clearly demonstrates which criterion from the DSM-5 definition of Substance Use Disorder?
- Craving
- Tolerance
- Withdrawal (Correct answer)
- Hazardous use
Correct answer: Withdrawal
Withdrawal—the emergence of a characteristic syndrome when a substance is discontinued—is a specific DSM-5 criterion for Substance Use Disorder.
Question 6: Environmental cues associated with past drug use trigger cravings primarily through which psychological mechanism?
- Operant conditioning extinction
- Classical (Pavlovian) conditioning (Correct answer)
- Observational learning only
- Cognitive restructuring
Correct answer: Classical (Pavlovian) conditioning
Through classical conditioning, neutral stimuli (places, people, objects) become conditioned stimuli that elicit craving responses after repeated pairing with drug use.
Question 7: Which of the following is a characteristic feature of Wernicke-Korsakoff syndrome, commonly seen in individuals with chronic alcohol use disorder?
- Vitamin B12 deficiency causing peripheral neuropathy
- Thiamine deficiency causing neurological damage and memory impairment (Correct answer)
- Folic acid deficiency causing megaloblastic anemia
- Niacin deficiency causing pellagra
Correct answer: Thiamine deficiency causing neurological damage and memory impairment
Wernicke-Korsakoff syndrome results from thiamine (Vitamin B1) deficiency, which is common in chronic alcohol use disorder due to poor nutrition and impaired absorption.
CASAC Foundations of Alcohol and Substance Use Disorders 4
Which neurotransmitter system is most directly implicated in the reinforcing effects of opioids?