Respiratory Physiology
Physiology · Topic 6
Source: NMC CBME Curriculum 2024 · Volume I · Physiology · Topic 6 · combined PDF page 154
Practice questions
- Which set of variables provides the basic framework for describing the mechanics of ventilation?
- For a fixed pressure gradient, which change would most directly reduce airflow through an airway?
- A lung has reduced compliance. Compared with a more compliant lung, what is generally required to produce the same volume change?
- Which statement best distinguishes airway resistance from lung compliance?
- Which description correctly represents the direction of respiratory gas movement?
- A respiratory problem is being assessed for its effects on oxygenation and carbon-dioxide removal. Which approach best follows the physiological pathways of these gases?
- Compared with adults, infants and young children have which airway feature that contributes to greater flow resistance?
- Which combination best describes the developmental respiratory features that can reduce pulmonary oxygen reserve in young children?
- A young child becomes apneic during a period of compromised ventilation. Which developmental combination helps explain why oxygen saturation may fall rapidly?
- Which respiratory control pattern is associated with immaturity of breathing control in infants?
- An infant is being monitored after anesthesia. Which respiratory concern is specifically associated with immature control of breathing?
- Which physiological abnormality is a defining feature of asthma in the reviewed respiratory-physiology literature?
- Which structural change is identified as a contributor to airway hyperresponsiveness in severe asthma?
- A review of severe asthma mechanisms describes airway smooth-muscle hypertrophy. Which interpretation best links this finding to respiratory physiology?
- Which additional process, besides structural airway changes, is identified as relevant to airway hyperresponsiveness in asthma?
- In the reviewed severe-asthma physiology, altered calcium signaling is discussed in which cell type?
- What is the broad physiological role of sensory neurons innervating the lower airway?
- Which sequence best represents the organization of lower-airway sensory feedback described in the literature?
- Why is it difficult to assign a precise respiratory function to every lower-airway sensory-neuron subtype?
- Which statement best reflects the evidence concerning average oxygen saturation and transient desaturation burden?
- A researcher proposes that transient desaturation burden may be important during wakefulness. What is the evidence status of this idea?
- A study finds no difference in average oxygen saturation between oral and nasal breathing while participants are awake. Which conclusion is most justified from the supplied evidence?
- Which statement about oral breathing and waking oxygenation stability is best supported by current evidence in the supplied review?
- A proposed mechanism links breathing route to ventilation-perfusion matching and chemoreflex activation. How should these mechanisms currently be classified?
- Which is a recognized physiological advantage of nasal breathing noted in the supplied review, without implying a proven waking oxygenation effect?