Respiratory Physiology: Flow-Volume Loop and Expiratory Flow Curve
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Questions and Answers

Where does gas exchange occur in the respiratory system?

  • Bronchial circulation
  • Alveolar-capillary membrane (correct)
  • Trachea and bronchi
  • Conducting zone
  • Which zone of the lungs warms and humidifies inspired air?

  • Bronchial circulation
  • Pulmonary circulation
  • Respiratory zone
  • Conducting zone (correct)
  • What is the function of the bronchial circulation in the lungs?

  • Serving as part of the body's defense system
  • Gas exchange (correct)
  • Distributing air equally
  • Warming and humidifying air
  • Which part of the lung serves as the anatomic dead space?

    <p>Conducting zone</p> Signup and view all the answers

    What is the site of gas exchange in the respiratory units known as?

    <p>Alveolar-capillary membrane</p> Signup and view all the answers

    Which part of the lung has its own distinct circulation called pulmonary circulation?

    <p>Respiratory zone</p> Signup and view all the answers

    What is the main role of the alveolar-capillary membrane in the lungs?

    <p>To facilitate gas exchange between the alveoli and capillaries</p> Signup and view all the answers

    Which physical law describes the relationship between pressure and volume changes when air moves into and out of the lungs?

    <p>Boyle's Law</p> Signup and view all the answers

    In a normal breathing cycle, what happens to intrapleural pressure during inspiration?

    <p>It decreases</p> Signup and view all the answers

    Which part of the respiratory system is responsible for conducting air into the lungs without participating in gas exchange?

    <p>Trachea</p> Signup and view all the answers

    What is the primary function of the respiratory zone in the lungs?

    <p>To facilitate gas exchange between air and blood</p> Signup and view all the answers

    During gas exchange in the lungs, where does oxygen move from and to?

    <p>From alveolar air to capillaries</p> Signup and view all the answers

    What is the term for the air that remains in the conducting airway and does not reach the alveoli?

    <p>Dead space volume</p> Signup and view all the answers

    Which equation is used to estimate alveolar ventilation with hyperventilation and hypoventilation?

    <p>Alveolar air equation</p> Signup and view all the answers

    What factor can drastically change Alveolar Ventilation by altering the rate or depth of breathing?

    <p>Hyperventilation</p> Signup and view all the answers

    What is the term for the alveoli ventilated but not perfused with pulmonary capillary blood?

    <p>Alveolar dead space</p> Signup and view all the answers

    Which equation uses CO2 levels to determine physiological dead space?

    <p>Bohr equation</p> Signup and view all the answers

    Which physical law describes the relationship between surface tension and pressure in alveoli?

    <p>Law of Laplace</p> Signup and view all the answers

    What substance reduces surface tension in the lungs and prevents alveolar collapse?

    <p>Pulmonary surfactant</p> Signup and view all the answers

    What condition results from a deficiency in pulmonary surfactant in premature infants?

    <p>Neonatal Respiratory Distress Syndrome (NRDS)</p> Signup and view all the answers

    What term refers to the sum of anatomic dead space and alveolar dead space?

    <p>Physiological dead space</p> Signup and view all the answers

    Which factor can lead to an increased lung compliance?

    <p>Emphysema (Obstructive Lung Disease)</p> Signup and view all the answers

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