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Respiration questions for NEET PG
20 Respiration questions from the Physiology section of the Recallab bank, each with a verified answer, every option explained and a reference to a current edition. 2 are published in full below.
- During acclimatization to high altitude all of the following take place, EXCEPT:
- A healthy volunteer breathes a hypoxic gas mixture and ventilation rises. Which event in the type I glomus cells of the carotid body initiates this response?
- A baby born at 29 weeks develops grunting, nasal flaring and intercostal recession within an hour of birth. Chest radiograph shows a diffuse ground-glass appearance with air bronchograms and poor…
- In which situation does the ventilation-perfusion ratio of a lung unit approach infinity?
- A patient has a large pulmonary embolus completely obstructing flow to one lung segment, while that segment continues to be ventilated. Compared with the arterial PaCO2, what happens to the end-tidal…
- A lobe of lung is collapsed by a mucus plug. Blood flow to that lobe falls sharply within minutes, while flow to the ventilated lobes rises. What explains the change in the collapsed lobe?
- In a preterm infant whose alveoli contain almost no surfactant, what happens to alveolar surface tension and to lung compliance, and why do the smallest alveoli empty into larger ones?