201. A student uses the words addiction, tolerance and dependence as though they mean exactly the same thing. Which distinction is most appropriate?
ⓐ. Addiction is an infection, tolerance is immunity and dependence is allergy
ⓑ. Tolerance means immediate overdose, while dependence means complete recovery
ⓒ. addiction is attachment; tolerance raises dose; dependence causes withdrawal
ⓓ. All three terms refer only to criminal behaviour
Correct Answer: addiction is attachment; tolerance raises dose; dependence causes withdrawal
Explanation: Addiction, tolerance and dependence are closely related but biologically distinct. Addiction refers to psychological attachment to the desired effects of a substance. Tolerance develops when repeated exposure reduces responsiveness, encouraging higher intake for the same effect. Dependence involves adaptation such that stopping regular use produces withdrawal symptoms such as anxiety, shakiness, nausea and sweating. Keeping these concepts separate helps explain how substance use can progress from experimentation to increasingly difficult patterns of control.
202. A person with severe dependence wants to stop using a drug immediately but has previously experienced intense withdrawal symptoms. The most appropriate response is to
ⓐ. double the drug dose before stopping
ⓑ. hide the problem from family and health professionals
ⓒ. seek professional medical support for withdrawal
ⓓ. substitute the drug with uncontrolled alcohol intake
Correct Answer: seek professional medical support for withdrawal
Explanation: Severe withdrawal can produce significant physical and psychological symptoms and may require medical supervision. Dependence is not simply a matter of willpower because repeated substance exposure can produce physiological adaptation. Professional support can help manage withdrawal safely and can be combined with counselling and rehabilitation to address the behavioural and psychological aspects of substance abuse. The relevant concept therefore encourages help-seeking rather than secrecy or unsafe self-management.
203. A person takes an excessive dose of a psychoactive substance and soon becomes unconscious. Which outcome is consistent with severe overdose?
ⓐ. Guaranteed development of active immunity
ⓑ. coma, organ failure and possible death
ⓒ. Immediate disappearance of tolerance
ⓓ. Permanent improvement in nervous-system function
Correct Answer: coma, organ failure and possible death
Explanation: Excessive intake of a psychoactive substance can produce acute toxicity severe enough to cause coma and, in extreme cases, death. Depending on the substance and circumstances, death may result from respiratory failure, heart failure or cerebral haemorrhage. The danger may increase further when drugs are combined with alcohol. Overdose differs from withdrawal because overdose results from excessive exposure, whereas withdrawal occurs when a dependent individual abruptly stops regular intake.
204. Which event represents an acute behavioural consequence associated with drug or alcohol abuse rather than a long-term organ complication?
ⓐ. Cirrhosis after chronic alcohol exposure
ⓑ. reckless behaviour, aggression, vandalism and violence
ⓒ. Progressive liver damage over years
ⓓ. Premature closure of long-bone growth centres after steroid misuse
Correct Answer: reckless behaviour, aggression, vandalism and violence
Explanation: Drug and alcohol abuse can produce immediate behavioural effects such as reckless actions, vandalism and violence. These acute consequences may endanger both the user and other people before long-term organ damage has had time to develop. Chronic complications such as liver damage or cirrhosis arise through prolonged exposure, while steroid-related growth disturbances represent another longer-term consequence. Distinguishing immediate from chronic effects helps clarify the different ways substance abuse can cause harm.
205. Combining a psychoactive drug with alcohol can be particularly dangerous because
ⓐ. combined exposure may cause severe toxicity, coma or death
ⓑ. alcohol always neutralises the drug completely
ⓒ. the combination automatically produces immunity to both substances
ⓓ. all withdrawal symptoms are prevented permanently
Correct Answer: combined exposure may cause severe toxicity, coma or death
Explanation: The relevant concept warns that excessive doses of drugs, especially when combined with alcohol, can produce life-threatening consequences. Different substances may place simultaneous stress on the nervous, cardiovascular or respiratory systems, increasing the risk of profound impairment, coma or death. The exact mechanism can vary with the substance, but the central principle is that combining psychoactive substances does not make them safer. Instead, it can make their physiological effects more dangerous and unpredictable.
206. A severe drug overdose results in failure of a vital physiological system. Which fatal mechanisms are specifically listed?
ⓐ. Increased antibody production, fever and vaccination
ⓑ. Intestinal perforation, malaria and ringworm
ⓒ. respiratory or heart failure, or cerebral haemorrhage
ⓓ. Increased contact inhibition and tumour regression
Correct Answer: respiratory or heart failure, or cerebral haemorrhage
Explanation: Severe overdose can be fatal through catastrophic failure of major body systems. The relevant concept specifically recognises respiratory failure, heart failure and cerebral haemorrhage among possible mechanisms leading to death. These outcomes demonstrate that drug abuse can become an immediate medical emergency rather than only a long-term behavioural problem. The risk becomes particularly serious when large doses or combinations of substances overwhelm normal physiological regulation.
207. A previously regular student begins missing classes, shows a sharp decline in academic performance, neglects personal hygiene, becomes increasingly isolated and displays marked changes in mood and sleep. This pattern should primarily be regarded as
ⓐ. definite proof of a specific drug having been used
ⓑ. a normal feature that should always be ignored during adolescence
ⓒ. a pattern of warning signs warranting support and further help
ⓓ. evidence that the student has developed an infectious disease
Correct Answer: a pattern of warning signs warranting support and further help
Explanation: The relevant concept lists academic decline, unexplained absence, poor personal hygiene, isolation, depression, fatigue, aggression and altered sleep or eating patterns among possible warning signs associated with drug or alcohol abuse. No single sign proves substance abuse by itself because similar changes can arise for other reasons. However, when several such changes occur together and persist, they should not simply be dismissed. The appropriate interpretation is that the pattern deserves careful, supportive attention and may indicate a need for counselling, communication with trusted adults or professional help.
208. Which set consists entirely of behavioural or lifestyle warning signs associated with possible substance abuse?
ⓐ. Formation of memory B cells, increased antibody titre and lymph-node enlargement
ⓑ. Haemozoin release, periodic fever and RBC rupture
ⓒ. Contact inhibition, tissue matching and passive immunity
ⓓ. Unexplained absence, poor hygiene, social isolation and altered sleep or eating
Correct Answer: Unexplained absence, poor hygiene, social isolation and altered sleep or eating
Explanation: The relevant concept identifies several behavioural and lifestyle changes that may accompany substance abuse, including unexplained absence from school or work, deterioration in personal hygiene, social withdrawal, altered sleep or eating habits, mood changes, aggression and falling academic performance. These signs are valuable because substance-related problems may first become visible through changes in everyday behaviour rather than through a single dramatic medical event. They are warning indicators that should prompt concern and supportive investigation, not automatic labelling of the individual.
209. A student with persistent substance abuse begins spending increasing amounts of money on the habit, becomes aggressive at home and damages relationships with family members. Which broader consequence is most directly illustrated?
ⓐ. Development of acquired immunity
ⓑ. Improved family functioning
ⓒ. family and financial distress
ⓓ. Reduced psychological burden on relatives
Correct Answer: family and financial distress
Explanation: Substance abuse often affects more than the person using the substance. The relevant concept notes that family members and friends may experience significant psychological distress as relationships deteriorate, trust is damaged and behaviour becomes unpredictable. Financial problems may also arise when increasing amounts of money are spent on obtaining drugs or alcohol or when academic or occupational functioning declines. Thus, substance abuse can become a social and family problem in addition to causing direct physiological harm to the user.
210. A teenager who was previously socially active becomes withdrawn, frequently fatigued, irritable and aggressive, and shows major changes in sleeping and eating habits. Which interpretation is most appropriate?
ⓐ. These changes establish the exact drug involved without further information
ⓑ. These changes necessarily indicate malaria
ⓒ. Such changes cannot be related to substance abuse
ⓓ. warning signs that should be recognised, not ignored
Correct Answer: warning signs that should be recognised, not ignored
Explanation: Isolation, fatigue, depression or mood disturbance, aggression and altered sleep and eating patterns are among the warning signs described in relation to drug or alcohol abuse. A single symptom is not sufficiently specific to diagnose substance abuse, but a cluster of persistent behavioural changes can indicate that something is wrong and deserves attention. Recognition of such danger signs is important because early support from parents, peers, counsellors or health professionals may prevent further progression of harmful behaviour.
211. Why should warning signs such as academic decline, poor hygiene and social withdrawal be interpreted cautiously rather than as automatic proof of drug abuse?
ⓐ. They occur only in people with HIV infection
ⓑ. They are unrelated to behaviour
ⓒ. They always disappear without any support
ⓓ. warning signs, not proof of drug abuse
Correct Answer: warning signs, not proof of drug abuse
Explanation: The warning signs are important because they can alert family members, teachers and friends to possible substance-related difficulties. However, they are not diagnostic markers of one particular drug or even of substance abuse alone. Academic decline, mood changes, fatigue or social withdrawal can have several possible causes. Their value lies in prompting supportive attention, communication and, when appropriate, professional assessment rather than encouraging premature judgement or stigma.
212. A group of intravenous drug users repeatedly shares the same contaminated syringe. Which pair of infections is specifically emphasised as being at increased risk through this practice?
ⓐ. malaria infection and ringworm
ⓑ. HIV infection and hepatitis B
ⓒ. typhoid fever and common cold
ⓓ. amoebiasis and lymphatic filariasis
Correct Answer: HIV infection and hepatitis B
Explanation: Sharing contaminated needles or syringes can transfer infected blood directly from one person to another. The relevant concept specifically highlights HIV and hepatitis B as serious infections that can spread through this behaviour. The risk is therefore not simply a toxic effect of the injected drug itself; it arises because the injection equipment becomes a vehicle for blood-borne pathogens. This explains why sterile, disposable injection equipment is an important preventive measure wherever injections are medically necessary.
213. The increased HIV risk associated with sharing needles during intravenous drug abuse is best explained by
ⓐ. blood transfer through contaminated needles
ⓑ. transfer of the virus through ordinary skin contact
ⓒ. stimulation of mosquito breeding
ⓓ. inhalation of contaminated respiratory droplets
Correct Answer: blood transfer through contaminated needles
Explanation: When a needle or syringe is shared, small amounts of infected blood can remain on or within the equipment and be introduced directly into another person's bloodstream. This creates an efficient route for transmission of blood-borne infections such as HIV and hepatitis B. The mechanism is entirely different from casual social contact, respiratory droplets or vector-borne transmission. Understanding this route clarifies why needle sharing is high risk while ordinary touch is not a route of HIV spread.
214. Which intervention most directly interrupts the infection risk created by shared intravenous-drug equipment?
ⓐ. Taking antihistamines before injection
ⓑ. use sterile disposable needles instead
ⓒ. Increasing intake of vitamin supplements
ⓓ. Wearing a mosquito net during injection
Correct Answer: use sterile disposable needles instead
Explanation: The infection risk arises because contaminated needles and syringes can carry blood containing pathogens from one user to another. Using sterile disposable equipment and avoiding needle sharing removes this blood-transfer pathway. This preventive principle is especially important for HIV and hepatitis B. It demonstrates a broader public-health rule: effective prevention is achieved by identifying the biological route of transmission and interrupting that specific route.
215. Consider two situations.
Case P: Two people shake hands with a person living with HIV.
Case Q: Two intravenous drug users share a contaminated needle.
Which conclusion is correct?
ⓐ. Both situations carry the same HIV-transmission risk
ⓑ. Case P is the major risk because HIV spreads through intact skin
ⓒ. Neither situation has any connection with HIV transmission
ⓓ. Case Q is a recognised transmission risk, but Case P is not
Correct Answer: Case Q is a recognised transmission risk, but Case P is not
Explanation: HIV is not spread by ordinary physical contact such as handshaking. Sharing a contaminated injection needle is very different because infected blood can be transferred directly into another person's body. Case Q therefore represents a genuine blood-borne transmission risk, while Case P does not. This comparison is important because accurate understanding of transmission simultaneously supports effective prevention and helps prevent unnecessary stigma toward people living with HIV.
216. Chronic abuse of drugs or alcohol can produce long-term damage particularly involving the
ⓐ. nervous system and liver
ⓑ. antibody heavy chains only
ⓒ. mosquito salivary glands
ⓓ. lymph-node capsules only
Correct Answer: nervous system and liver
Explanation: Long-term substance abuse can damage major organ systems, especially the nervous system and liver. Psychoactive substances repeatedly disturb neural function, while chronic alcohol consumption places a major metabolic burden on the liver and can eventually contribute to serious liver disease. These consequences develop over time and therefore differ from acute problems such as intoxication, reckless behaviour or overdose. The relevant concept uses this distinction to show that substance abuse can cause both immediate and chronic harm.
217. A person consumes excessive alcohol regularly for many years and develops severe chronic liver damage. Which condition is most closely associated with this pattern?
ⓐ. Pneumonia
ⓑ. Ringworm
ⓒ. Allergy
ⓓ. Cirrhosis
Correct Answer: Cirrhosis
Explanation: Chronic alcohol abuse can damage liver tissue and is associated with cirrhosis. The liver plays a central role in metabolism and detoxification, so repeated excessive alcohol exposure can progressively impair its structure and function. Cirrhosis represents a long-term consequence rather than an immediate intoxicating effect. This distinction is important because some of the most serious effects of alcohol abuse may develop gradually after years of repeated exposure.
218. Why is alcohol use during adolescence considered especially concerning in the long-term risk perspective?
ⓐ. It guarantees complete immunity to alcohol in adulthood
ⓑ. early alcohol use may predispose to heavier adult drinking
ⓒ. It prevents all later psychological attachment
ⓓ. It has no possible relationship with adult drinking patterns
Correct Answer: early alcohol use may predispose to heavier adult drinking
Explanation: The relevant concept warns that alcohol use during adolescence can be associated with an increased likelihood of heavier alcohol use later in life. Adolescence is already a period of biological and behavioural transition, and repeated substance use during this stage can establish patterns that persist into adulthood. The point is not that every adolescent who experiments with alcohol will inevitably develop severe dependence, but that early use is a meaningful risk factor that should be taken seriously in prevention efforts.
219. Substance abuse during pregnancy is especially concerning because
ⓐ. the developing foetus may also suffer adverse effects
ⓑ. psychoactive substances always improve foetal development
ⓒ. only the mother can be affected by the exposure
ⓓ. pregnancy prevents drugs from reaching maternal tissues
Correct Answer: the developing foetus may also suffer adverse effects
Explanation: Drug and alcohol use during pregnancy can affect not only the pregnant individual but also the developing foetus. The relevant concept therefore includes adverse foetal effects among the important long-term and wider consequences of substance abuse. Development before birth is highly sensitive to changes in the maternal internal environment, so harmful substance exposure may interfere with normal development. This is another example of how the consequences of abuse can extend beyond the immediate user.
220. Which table correctly distinguishes an acute consequence from a chronic consequence of substance abuse?
| Type | Example |
|---|
| P. Acute consequence | I. Coma after severe overdose |
| Q. Chronic consequence | II. Liver damage after prolonged alcohol abuse |
ⓐ. P-I, Q-II
ⓑ. P-II, Q-I
ⓒ. P-I, Q-I
ⓓ. P-II, Q-II
Correct Answer: P-I, Q-II
Explanation: Coma following an excessive dose is an acute consequence because it can occur rapidly after severe intoxication. Chronic liver damage develops over a much longer period of repeated alcohol exposure. Distinguishing acute from chronic effects helps organise the health consequences of substance abuse: some threaten life immediately, while others progressively damage organs over months or years. Both types of harm are important even though their time courses differ.
