D403 Understanding Substance Abuse and Addiction
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Free D403 Understanding Substance Abuse and Addiction Questions
Enkephalins and endorphins:
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Produce presynaptic inhibition of neurons transmitting pain sensation in the CNS.
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Bind to opiate receptors
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Terminate pain signals by inhibiting the release of substance P from presynaptic neurons
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All the above
Explanation
Enkephalins and endorphins are endogenous opioids, meaning they are naturally produced by the body to reduce pain and induce feelings of well-being. They bind to opioid receptors in the central nervous system (CNS), inhibit the release of substance P (a neurotransmitter responsible for transmitting pain), and produce presynaptic inhibition in pain pathways. Together, these actions help modulate pain perception and emotional response to pain.
Which of the following is NOT true about alcohol distribution?
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distributes throughout the body relatively evenly
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it is lipophilic and crosses the blood-brain barrier
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it is transferred into the brain by g-coupled proteins
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it easily crosses the placental barrier
Explanation
Alcohol distributes relatively evenly throughout body fluids and tissues and, due to its lipophilic nature, easily crosses the blood-brain barrier and the placental barrier. However, it is not transferred into the brain by G-protein–coupled proteins. Instead, alcohol diffuses freely across cell membranes because of its small molecular size and solubility in both water and lipids. This ability to move freely through biological barriers explains how alcohol quickly affects the central nervous system and influences brain function shortly after ingestion.
What is a critical sign that may indicate acute alcohol poisoning in an individual who has engaged in binge drinking?
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Severe confusion or inability to stay awake
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Increased energy and alertness
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Enhanced coordination and balance
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Heightened sense of euphoria
Explanation
A critical sign of acute alcohol poisoning is severe confusion or an inability to stay awake. This condition occurs when excessive alcohol depresses the central nervous system, impairing vital functions like breathing, heart rate, and body temperature regulation. Other symptoms may include vomiting, seizures, slow or irregular breathing, and pale or bluish skin. Unlike mild intoxication, alcohol poisoning is a medical emergency that can quickly become fatal without immediate intervention. Recognizing the warning signs early is essential for preventing coma or death.
After effects felt the day after drinking too much alcohol is called...
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Hangover
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Intoxication
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Blackout
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Binge drinking
Explanation
A hangover refers to the unpleasant physical and mental symptoms that occur after excessive alcohol consumption, typically the next day. Symptoms include headache, nausea, fatigue, dehydration, and sensitivity to light or sound. A blackout refers to memory loss during intoxication, while intoxication is the state of being under the influence of alcohol, and binge drinking is the pattern of consuming large amounts of alcohol in a short period. Therefore, the after-effects are best described as a hangover.
What is the first basic stage of alcohol and drug use?
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Curiosity
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Desire to "be cool"
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Experimentation
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Intense preoccupation with the desire to try a drug
Explanation
The first basic stage of alcohol and drug use is typically experimentation. This stage is often driven by curiosity, peer influence, or the desire to experience the effects of a substance firsthand. At this point, the individual does not yet have a pattern of use or dependence; rather, they are testing boundaries and learning about the drug’s effects. While experimentation may appear harmless initially, it can progress to regular use or dependency if the person begins to rely on the substance for coping or pleasure.
What is the primary physiological risk associated with a Blood Alcohol Concentration (BAC) of .60, particularly after consuming approximately 20 alcoholic beverages?
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Severe dehydration
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Respiratory failure
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Increased heart rate
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Enhanced cognitive function
Explanation
A BAC of .60 is considered extremely life-threatening, as it severely depresses the central nervous system. At this level, alcohol suppresses vital functions such as breathing and heart rate, leading to respiratory failure, coma, or death. The body’s gag reflex is also inhibited, increasing the risk of choking on vomit. While lower BAC levels may cause disorientation and motor impairment, a BAC of .60 represents critical alcohol poisoning — a medical emergency requiring immediate intervention.
Identify the neurotransmitter involved in alertness and arousal, as well as in learning and mood regulation.
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Norepinephrine
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Serotonin
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Dopamine
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Acetylcholine
Explanation
What is a significant characteristic of oxycodone compared to other narcotics?
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It is less potent than morphine.
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It can only be administered through injection.
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It retains its potency when taken orally.
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It has no potential for dependence.
Explanation
Oxycodone is a semi-synthetic opioid derived from thebaine and is known for its high oral bioavailability, meaning it retains much of its potency when taken orally. This property makes it effective for pain management without requiring injections, unlike many other opioids that lose potency when ingested. However, because of this efficiency and its euphoric effects, oxycodone has a high potential for abuse and dependence.
At what blood alcohol concentration (BAC) level is a person likely to experience severe intoxication, characterized by minimal conscious control over their mind and body?
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BAC .10: 2 drinks, mild impairment
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BAC .20: 6 drinks, significant impairment
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BAC .30: 10 drinks, severe intoxication
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BAC .40: 15 drinks, potential coma
Explanation
A BAC of .30 is associated with severe intoxication, where an individual has little conscious control over their physical and mental faculties. At this level, motor coordination, balance, and speech are severely impaired, and the person may experience confusion, vomiting, and near-total loss of awareness. This stage poses a high risk of injury, aspiration, or even life-threatening respiratory depression. By contrast, a BAC of .40 or higher can result in coma or death due to complete central nervous system shutdown. Therefore, .30 represents the level where severe intoxication and loss of control are most evident.
Moderate or severe substance use disorders in early or sustained remission are classified to the appropriate codes for:
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Substance dependence in remission
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Substance use, unspecified
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Substance use in remission
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Substance abuse in remission
Explanation
According to the DSM-5 and ICD-10/11 classification systems, moderate or severe substance use disorders that are in remission—whether early (3 to 12 months) or sustained (12 months or more)—are coded under substance dependence in remission. This distinction acknowledges that the individual previously met the criteria for substance dependence but currently shows no signs of active use or related symptoms.
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