Would you rather choose the next action, identify a relationship or explain the mechanism behind a finding?
This medical quiz offers five questions in each category. The clinical scenarios are fictional, and the scientific questions are original exercises rather than copies of an examination or daily game.
Answer each question before reading the key. For discussion, give one point for the preferred answer and one for a defensible explanation. The resulting score is an informal learning aid, not an assessment of professional competence.
The management questions use UK settings. Where a patient needs urgent care, the purpose is to recognise the required response, not to reproduce an entire local protocol.
Round 1: five clinical decisions
1. A reassuring conversation after a head injury
A 76-year-old taking warfarin struck their head in a fall two hours ago. They are now alert, conversing normally and have no obvious focal neurological deficit. No clinician has yet assessed the injury.
Which is the best next step?
A. Reassure them that normal conversation excludes an important intracranial injury.
B. Arrange urgent emergency-department assessment and apply the relevant head-injury pathway.
C. Wait for weakness or a seizure before seeking assessment.
2. A painfully full bladder
A 71-year-old has been unable to pass urine for several hours. They have marked suprapubic discomfort and a bladder scan showing approximately 750 mL. There is no history suggesting urethral injury.
Which action should not be deferred merely to obtain routine outpatient imaging?
A. Appropriate prompt bladder drainage by a trained clinician.
B. Advice to drink several litres and return next week.
C. Treatment only after chronic retention has been established over several months.
3. Contraception does not complete the assessment
A 28-year-old who could become pregnant reports new unilateral lower abdominal pain and vaginal spotting. They use contraception and are currently haemodynamically stable. Pregnancy status has not been established.
What is the most appropriate next step?
A. Exclude pregnancy because contraception is being used.
B. Assess promptly, establish pregnancy status and consider an ectopic-pregnancy pathway according to the findings.
C. Assume a routine menstrual symptom without further assessment.
4. A hot joint with systemic symptoms
A previously mobile 67-year-old develops a very painful, swollen knee over one day and feels febrile. There is no established explanation for the episode.
Which is the priority?
A. Treat presumed osteoarthritis without reassessment.
B. Arrange a routine physiotherapy appointment.
C. Arrange urgent hospital assessment for possible joint infection and other acute causes.
5. The treatment request is narrower than the symptom
A 62-year-old asks for acid-suppression treatment but also describes progressive difficulty swallowing solid food over several weeks. They can currently swallow fluids and have no acute airway problem.
Which is the best response?
A. Assess and arrange prompt investigation or referral for the dysphagia rather than prescribing alone.
B. Treat indefinitely without investigating unless the patient develops pain.
C. Explain that being able to swallow fluids excludes a significant problem.
Round 2: five clinical associations
6. Connect the electrical structures
Sinoatrial node - atrioventricular node - bundle of His - Purkinje fibres
What system links these structures, and why would "all are contractile ventricular muscle" be an unsuitable category?
7. Connect the endocrine products
Cortisol - aldosterone - adrenal androgens
Which broad anatomical region produces these hormones? Identify the relevant contrast with adrenaline.
8. Connect the plasma proteins
Albumin - fibrinogen
What major production site do they share, and why should immunoglobulin production not simply be added to the same rule?
9. Connect the contractile machinery
Actin - myosin - troponin - tropomyosin
Which of these binds calcium to initiate the regulatory change that exposes binding sites during skeletal-muscle contraction?
10. Connect the glands
Parotid - submandibular - sublingual
What anatomical category links them? Do all salivary glands belong to this named three-pair set?
Round 3: five harder mechanism questions
11. Ventilation without matching blood flow
In a simplified model, an alveolar unit remains ventilated but loses its pulmonary blood supply.
Does its ventilation-perfusion relationship move towards dead-space physiology or towards shunt physiology?
12. A faster pulse does not settle cardiac output
A hypothetical measurement gives a heart rate of 120/min and a stroke volume of 25 mL.
Calculate cardiac output in litres per minute. Explain why the heart rate alone would be insufficient to establish whether output is high.
13. Change one renal variable
In a simplified model with other relevant variables held constant, the afferent arteriole constricts.
What happens to glomerular blood flow and the pressure supporting filtration? Why is "all arteriolar constriction has the same renal effect" too broad?
14. Remove a stabilising substance
Pulmonary surfactant falls substantially in an illustrative alveolar model.
What happens to surface tension, and does maintaining alveolar expansion become easier or more difficult?
15. A cross-bridge cannot detach
In a simplified skeletal-muscle model, myosin has bound to actin, but a new ATP molecule cannot bind to the myosin head.
Which step of the cross-bridge cycle is impaired?
Answers: clinical decisions
1. B: assess the head injury urgently
Anticoagulant treatment changes the assessment even when the person appears well. The NHS head-injury guidance identifies blood-thinning treatment as a reason for emergency assessment after head injury.
The next task is applying the appropriate pathway, including assessment for imaging where indicated. Normal conversation is not an adequate exclusion test.
The plausible mistake is treating the absence of an obvious deficit as equivalent to the absence of risk. The question does not supply enough information to decide the eventual imaging result.
The independent decisions in stat similarly ask what should happen in the circumstances given, rather than rewarding recognition of a diagnostic label alone.
2. A: relieve the acute retention
The NIDDK's treatment guidance describes immediate catheter drainage for acute urinary retention.
In this constructed scenario, there is painful retention without a supplied reason to suspect urethral trauma. Appropriate drainage and assessment should not wait for routine outpatient imaging.
The underlying cause still needs investigation. Relieving the immediate problem does not establish why it occurred or complete the follow-up plan.
3. B: assess pregnancy-related risk rather than dismissing it
The NHS ectopic-pregnancy overview describes the relevance of abdominal pain and vaginal bleeding, and the need for assessment when pregnancy is possible.
Contraception does not establish that pregnancy is impossible. The immediate task is to assess the patient, establish relevant information and select the appropriate pathway.
New instability or symptoms suggesting rupture would change the urgency further. The stable presentation supplied here must not be used to imply that all possible ectopic pregnancies are stable.
4. C: consider joint infection urgently
The NHS septic-arthritis guidance identifies a rapidly developing painful swollen joint, sometimes accompanied by systemic symptoms, as requiring urgent assessment.
This does not prove the joint is infected. It establishes why an important acute possibility must be addressed before defaulting to an uncomplicated mechanical explanation.
The most plausible distractor is not necessarily the most familiar diagnosis. It is the tempting decision to treat a symptom without first assessing the consequence of being wrong.
5. A: investigate the swallowing problem
Progressive dysphagia should not disappear from the consultation merely because the initial request was for a familiar medicine.
The NHS dysphagia guidance advises urgent assessment for swallowing difficulty and describes subsequent investigation according to the cause.
Being able to swallow fluids does not make progressive solid-food difficulty irrelevant. The appropriate next step is a clinical assessment and investigation or referral plan, not an indefinite prescription without explanation.
Answers: associations
6. The cardiac conduction system
The named structures participate in initiating or transmitting the electrical activity coordinating the heartbeat. They are not simply interchangeable examples of ordinary ventricular contractile muscle.
OpenStax's cardiac electrical-activity chapter explains the sequence.
The useful relationship concerns function within a system. Recognising the names without understanding their order leaves an important part of the association unresolved.
7. The adrenal cortex
Cortisol, aldosterone and adrenal androgens are products of the adrenal cortex. Adrenaline provides the contrasting adrenal-medullary example.
The adrenal-gland chapter distinguishes these regions and their products.
Sharing an organ does not mean sharing the same tissue compartment, regulation or physiological role. The category becomes useful when those differences remain visible.
8. Predominantly hepatic production
Albumin and fibrinogen are produced by the liver. Immunoglobulins are produced by plasma cells rather than being assigned automatically to the same production rule.
OpenStax's blood overview explains the distinction.
"Plasma protein" describes where the proteins are found, not a universal answer to where they are made.
9. Troponin binds the calcium signal
Calcium binding to troponin alters the regulatory arrangement involving tropomyosin, allowing interaction between actin and myosin.
The muscle-contraction chapter describes this sequence.
The tempting mistake is to treat all four proteins as though they perform the same job. They belong to one functional system but occupy different roles within it.
10. The major paired salivary glands
The parotid, submandibular and sublingual glands are the major paired salivary glands. They are not an exhaustive list of all salivary tissue: smaller glands also contribute.
OpenStax's oral anatomy chapter describes the arrangement.
This is another example of a selected group being correct without being complete.
Answers: mechanisms
11. Towards dead-space physiology
Ventilation remains while perfusion falls away, so the unit moves towards dead-space physiology.
Shunt physiology represents the contrasting problem of blood reaching a region without adequate ventilation. OpenStax's gas-exchange chapter explains the importance of matching ventilation and perfusion.
The model concerns one unit. A whole patient may have multiple abnormalities and compensatory responses at the same time.
12. Cardiac output is 3.0 L/min
The calculation is:
120 beats/min x 25 mL/beat = 3,000 mL/min = 3.0 L/min.
The relationship between heart rate, stroke volume and cardiac output is described in OpenStax's cardiac-physiology chapter.
The values are illustrative, not patient measurements. The point is that a high rate can coexist with a small volume per beat; one variable cannot stand in for their product.
13. Afferent constriction reduces inflow and filtration pressure
With the stated simplification, afferent constriction reduces blood entering the glomerulus and lowers the pressure supporting filtration.
The renal-blood-flow chapter explains the different roles of afferent and efferent resistance.
The location of resistance matters. A statement about one arteriole should not be transferred unchanged to the other, particularly when the degree of constriction and wider physiology vary.
14. Surface tension rises
Reducing surfactant increases surface tension and makes alveolar expansion more difficult to maintain.
The respiratory-system chapter describes surfactant's role.
The answer concerns a mechanism. It is not a complete explanation of every cause of respiratory distress or a treatment recommendation for a particular patient.
15. Detachment is impaired
Binding of a new ATP molecule permits the myosin head to detach from actin. Without that step, the attached cross-bridge cannot proceed normally.
The cross-bridge explanation separates ATP binding from the later use of energy after hydrolysis.
The distinction prevents "ATP provides energy" from becoming an explanation so broad that it hides the specific event being asked about.
Which round deserves another attempt?
Review the reasoning, not just the tally.
A missed decision may concern urgency or an assumption about the patient. A missed association may concern the category boundary. A missed mechanism may require following the sequence more carefully.
The clinical connections game offers another relationship-based task, while stat supplies three independent UK-context decisions. Neither today's subject matter nor an automated follow-up session is guaranteed to match this quiz.
Frequently asked questions
Is this quiz intended for doctors or medical students?
Both can use it, but some management questions assume clinical familiarity. The explanations are designed for discussion rather than certification.
Does a high score establish examination readiness?
No. Fifteen selected questions do not provide systematic syllabus coverage or a validated prediction of examination performance.
Are these questions copied from iatroX games?
No. They are original article exercises. The daily games provide separate challenges and explanations.