🎯 Theme 6 Exam Practice

A child with suspected cystic fibrosis has compatible clinical features. Which additional finding would provide the strongest direct support that the underlying epithelial transport defect is present?

A child with cystic fibrosis develops chronic liver disease. Which mechanism best links the underlying disorder to the hepatic complication?

A 64-year-old man develops sudden breathlessness after a large pleural effusion accumulates on the right side. Imaging shows collapse of the adjacent lower lobe, but the bronchial lumen is patent. Which mechanism best explains the loss of lung volume?

A premature infant receives exogenous surfactant and subsequently requires less pressure to expand the lungs. Which change most directly accounts for this improvement?

An 8-month-old infant with bronchiolitis is tachypneic and feeding poorly. Oxygen saturation is reduced, but there is no evidence of bacterial infection. Which management approach best addresses the main physiological problems?

A 7-year-old boy develops bronchiectasis confined mainly to one lung segment. His mother recalls an episode of choking while eating several months earlier. Which underlying process most likely accounts for the localized disease?

A newborn develops intestinal obstruction shortly after birth. Further evaluation reveals cystic fibrosis. Which manifestation best explains the neonatal presentation?

A resected lung specimen from a patient with long-standing bronchiectasis shows markedly widened airways containing mucopurulent material. Which additional microscopic finding would best support the pathological mechanism of this disease?

During the early phase of ARDS, activated inflammatory cells accumulate in the pulmonary microcirculation and contribute to alveolar-capillary injury. Which released substances are most directly responsible for amplifying tissue damage?

A junior team member notices a potential patient-safety problem but is reluctant to speak because the consultant is very senior. Which leadership response best addresses the underlying power dynamic?

During a busy ward round, a senior doctor asks a junior colleague to perform a task within the junior's competence. The senior clearly explains the expected outcome but does not define when the junior should seek help. Which additional action would make the delegation safer?

Histological examination of lung tissue from a patient with severe acute respiratory failure shows damaged alveolar epithelium, interstitial edema and fibrin-rich material lining alveoli. Which pathological process best unifies these findings?

A student compares ARDS in an adult with respiratory distress syndrome in a premature newborn. Which distinction is most accurate?

A 30-week gestation newborn develops respiratory distress shortly after birth. The infant's alveoli repeatedly collapse during expiration. Which physiological abnormality is central to this process?

A child with cystic fibrosis has poor weight gain, abdominal distension and greasy stools. Which pathophysiological event most directly produces these findings?

A newborn has respiratory distress shortly after premature delivery. Pulse oximetry confirms reduced oxygen saturation, and imaging shows diffuse bilateral poor aeration. Which management approach best addresses both the physiological consequence and the underlying mechanism?

A patient with acute lung injury develops marked hypoxemia. Pulmonary edema is present despite no evidence that raised hydrostatic pressure is the main cause. Which mechanism best explains the edema?

An infant with bronchiolitis has progressive recession, poor feeding and increasing lethargy. Which feature in this presentation most strongly indicates the need for escalation of supportive care?

A preschool child had repeated wheezing episodes during infancy but is now symptom-free at 5 years of age. There is no eczema, no parental asthma and no wheezing between viral infections. Which pattern best describes this clinical course?

A 3-year-old child has recurrent chest infections, poor weight gain and bulky greasy stools. Cystic fibrosis is suspected. Which combination best explains the respiratory and gastrointestinal findings?

A patient recovering from severe ARDS develops persistently reduced lung compliance. Which late pathological change most likely explains this finding?

A child has chronic cough, recurrent lower respiratory infections and poor growth. Sweat testing supports cystic fibrosis. Which physiological abnormality in sweat glands explains the diagnostic finding?

A 9-year-old child has recurrent productive cough and repeated lower respiratory tract infections. Imaging shows dilated bronchi extending unusually close to the pleural surface. Histology demonstrates destruction of smooth muscle and elastic tissue in the bronchial wall. Which process best explains persistence of the airway abnormality?

A patient with long-standing fibrotic disease of the pleura has persistent failure of the underlying lung to expand despite removal of pleural fluid. Which pathological process best accounts for this finding?

A child with primary ciliary dyskinesia develops recurrent respiratory infections followed by bronchiectasis. Which sequence best links the underlying disorder to the final structural lesion?

A patient survives the acute phase of diffuse alveolar damage. Repeat histology shows proliferation of cells attempting to restore the damaged alveolar lining. Which cells are primarily responsible for this reparative response?

A preterm newborn has marked inspiratory effort because the lungs repeatedly collapse after expiration. Which change in lung mechanics is most directly responsible for the increased work of breathing?

A pathologist identifies eosinophilic material lining the alveoli in a patient with ARDS. Which combination best describes the origin of this material?

A 6-month-old infant presents with cough, tachypnea, chest recession and wheezing during a viral respiratory illness. The child has no previous history of recurrent wheeze. Which mechanism most directly explains the airflow limitation?

A 15-year-old boy with cystic fibrosis is counseled about possible long-term systemic manifestations. Which reproductive abnormality is most closely associated with this disorder?

A newborn with respiratory distress produces an audible expiratory grunt. Which physiological purpose is best served by this response?

A 55-year-old man develops severe respiratory failure following a major systemic inflammatory insult. His lungs are heavy and poorly compliant. Which pathological alteration most directly explains the accumulation of fluid within the alveolar spaces?

A 4-year-old girl has recurrent wheezing. Her mother has asthma, the child has eczema, and wheezing also occurs when she has no respiratory infection. Which interpretation is most appropriate?

A preterm infant with respiratory distress remains spontaneously breathing but has repeated alveolar collapse and increasing oxygen requirement. Which intervention most directly improves alveolar stability by maintaining positive pressure at the end of expiration?

A 10-year-old child with cystic fibrosis develops progressive structural airway disease despite repeated treatment of respiratory infections. Which mechanism best explains development of bronchiectasis?

A premature infant born to a mother with diabetes develops respiratory difficulty shortly after delivery. Which maternal-fetal effect most plausibly contributed to the infant's pulmonary problem?

A newborn with suspected respiratory distress syndrome is being assessed for severity of gas-exchange impairment. Which investigation provides the most useful information about oxygenation, carbon dioxide retention and acid-base status together?

A postoperative patient develops obstruction of a lobar bronchus by retained secretions. Several hours later, the distal lung becomes airless and smaller in volume. Which event most directly produces the collapse?

A premature newborn has tachypnea, nasal flaring and chest retractions. Chest radiography demonstrates diffuse finely granular opacities with visible air-filled bronchi. Which interpretation best fits these findings?

A junior doctor treats an infant with bronchiolitis as an acute asthma attack and prescribes repeated bronchodilators as the main therapy. Which feature of bronchiolitis best explains why this approach may be inappropriate?