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Questions and Answers

What does compliance of lung refer to?

  • The size of the lung
  • The color of the lung
  • The ease of inflating the lung (correct)
  • The weight of the lung
  • How can a lung be classified as compliant?

  • When it is inflated with excessive force
  • When it is not inflated at all
  • When it is inflated with little force (correct)
  • When it is removed from the body
  • What happens if a lung is inflated with too much force?

  • It becomes smaller
  • It becomes uncompliant (correct)
  • It becomes more stretchable
  • It becomes transparent
  • What is the relationship between inflation force and lung compliance?

    <p>Inverse relationship</p> Signup and view all the answers

    Why is lung compliance important?

    <p>For proper breathing function</p> Signup and view all the answers

    What variable is typically represented on the x-axis in a lung pressure-volume graph?

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

    In the context of measuring lung volume, which variable is considered the dependent variable?

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

    How is the change in lung volume denoted in relation to a change in pressure in lung studies?

    <p>$\Delta V$</p> Signup and view all the answers

    Which of the following variables increases when the airway expands in lung studies?

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

    Why is it important to put the independent variable on the x-axis and the dependent variable on the y-axis in lung pressure-volume graphs?

    <p>To follow standard graphing conventions</p> Signup and view all the answers

    What is the wise approach when inflating a partially inflated lung with high compliance?

    <p>Apply little force and avoid too much change in volume</p> Signup and view all the answers

    Why is it not wise to inflate a totally inflated lung?

    <p>The deflation curve differs from the inflation curve</p> Signup and view all the answers

    Which curve do we consider when determining lung compliance?

    <p>Deflation curve</p> Signup and view all the answers

    How is the respiratory system described in terms of balloons?

    <p>Two balloons - lung and thorax</p> Signup and view all the answers

    What does hysteresis refer to in the context of lung inflation?

    <p>Difference between forward and backward process during deflation</p> Signup and view all the answers

    Compared to functional residual capacity (FRC), what will be the tendency of the thorax to expand?

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

    What will be the tendency of the lung-thorax system?

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

    How does the thorax respond in relation to FRC?

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

    What happens to the thorax's tendency compared to FRC?

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

    In relation to functional residual capacity (FRC), what does the lung-thorax system do?

    <p>Tense up</p> Signup and view all the answers

    What is the primary purpose of increasing FRC as mentioned in the text?

    <p>To decrease the tendency to collapse of lung</p> Signup and view all the answers

    How does increasing FRC affect the tendency to collapse of the lung?

    <p>It reduces the tendency of lung collapse</p> Signup and view all the answers

    What might happen if the FRC is not increased as suggested in the text?

    <p>Decreased lung compliance</p> Signup and view all the answers

    Which of the following is NOT a reason for increasing FRC according to the text?

    <p>To improve lung compliance</p> Signup and view all the answers

    In the context of lung physiology, what does FRC stand for?

    <p>Functional Respiratory Capacity</p> Signup and view all the answers

    At functional residual capacity in a normal male adult, which of the following is true regarding the lung volume?

    <p>It is the volume of air left in the lungs after a normal exhalation.</p> Signup and view all the answers

    What is the primary function of increasing functional residual capacity as discussed in the text?

    <p>To prevent lung collapse</p> Signup and view all the answers

    How is the relationship between inflation force and lung compliance best described?

    <p>Inflation force and lung compliance are inversely related.</p> Signup and view all the answers

    In lung physiology, what does FRC stand for?

    <p>Functional Residual Capacity</p> Signup and view all the answers

    Which variable typically increases when the airway expands in lung studies?

    <p>Lung Compliance</p> Signup and view all the answers

    What happens to lung compliance when the thorax expands beyond functional residual capacity?

    <p>Lung compliance decreases</p> Signup and view all the answers

    If the pressure in the box is 760 mmHg, according to Boyle's law, what will happen to the pressure if the volume is decreased?

    <p>The pressure will increase</p> Signup and view all the answers

    What is the potential consequence of inflating a totally deflated lung, as mentioned in the text?

    <p>Increased ATP production</p> Signup and view all the answers

    How does increasing the volume affect pressure according to Boyle's law?

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

    Why should ATP levels not exceed 2% when inflating a totally deflated lung?

    <p>To reduce the workload on the lungs</p> Signup and view all the answers

    What distinguishes the resting volume from the residual volume of the lung, as per the text?

    <p>Amount of air remaining in the lungs</p> Signup and view all the answers

    What is the direct relationship between volume and pressure according to Boyle's law?

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

    Why is it cautioned against inflating a totally deflated lung, leading to excessive effort and ATP usage?

    <p>To avoid excessive ATP consumption</p> Signup and view all the answers

    If the volume in the box increases, what effect does this have on the pressure based on Boyle's law?

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

    What key factor contributes to making it unwise to inflate a totally deflated lung?

    <p>Elevated hysteresis levels</p> Signup and view all the answers

    How does Boyle's law explain the relationship between volume and pressure when applied to a closed box?

    <p>They are inversely proportional</p> Signup and view all the answers

    What is the significance of considering the deflation curve rather than the inflation curve when determining lung compliance?

    <p>It provides a more accurate measure of lung compliance</p> Signup and view all the answers

    Why do we refer to the lung as having high compliance when partially inflated?

    <p>To prevent excessive changes in lung volume</p> Signup and view all the answers

    What is the implication of hysteresis in the lung-thorax system during deflation?

    <p>It signifies a difference between forward and backward processes</p> Signup and view all the answers

    How is the respiratory system described in terms of balloons according to the text?

    <p>A system with an internal lung balloon and an external thorax balloon</p> Signup and view all the answers

    What is the approximate compliance of the lung as mentioned in the text?

    <p>$300ml/1cmH2O$</p> Signup and view all the answers

    What proportion of lung collapse is attributed to surface tension according to the text?

    <p>Two thirds</p> Signup and view all the answers

    Which factor accounts for one third of lung collapse based on the information provided?

    <p>Elastic fibers</p> Signup and view all the answers

    In the context of lung physiology, what does FRC specifically stand for?

    <p>Functional Respiratory Capacity</p> Signup and view all the answers

    What is the primary role of surface tension in the context of lung physiology?

    <p>Preventing lung overexpansion</p> Signup and view all the answers

    Which component of the lung-thorax system primarily contributes to the elastic properties of the lungs?

    <p>Elastic fibers</p> Signup and view all the answers

    What is the most likely disorder that the man has based on the text?

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

    Which lung disorder is characterized by irreversible scarring of lung tissue?

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

    Which lung condition is typically associated with long-term smoking?

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

    Which disease is characterized by the inflammation and narrowing of the airways?

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

    Which lung disorder involves the abnormal accumulation of air in the lungs' alveoli, leading to decreased lung function?

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

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