L5 Lung Volumes and Capacities in Medical Physiology
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Questions and Answers

What is the function of a spirometer?

  • Monitor brain activity
  • Measure lung volumes and capacities (correct)
  • Assess heart rate
  • Analyze blood oxygen levels

    • Which lung function test is related to time?

  • Peak Expiratory Flow Rate (PEFR) (correct)
  • Tidal volume
  • Inspiratory reserve volume
  • Residual volume

    • What is the purpose of lung function tests?

  • Monitor kidney function
  • Measure heart function
  • Evaluate liver health
  • Assess efficiency of breathing mechanism (correct)

    • Which lung volume is NOT measured using a spirometer?

    <p>Residual volume</p> Signup and view all the answers

    What is the purpose of Forced Vital Capacity (FVC) test?

    <p>Evaluate respiratory muscle strength</p> Signup and view all the answers

    Which lung capacity represents the total amount of air the lungs can hold?

    <p>Vital capacity</p> Signup and view all the answers

    What is the normal value for Vital Capacity (VC)?

    <p>4600 ml</p> Signup and view all the answers

    Which lung volume is increased in old age and in obstructive lung diseases like emphysema?

    <p>Residual Volume (RV)</p> Signup and view all the answers

    What is the method used to measure Residual Volume (RV)?

    <p>Helium dilution</p> Signup and view all the answers

    What is the normal value for Inspiratory Capacity (IC)?

    <p>3500 ml</p> Signup and view all the answers

    Which lung capacity is the sum of Tidal Volume (TV), Inspiratory Reserve Volume (IRV), and Expiratory Reserve Volume (ERV)?

    <p>Vital Capacity (VC)</p> Signup and view all the answers

    What is the normal value for Tidal Volume (TV)?

    <p>500 ml</p> Signup and view all the answers

    Which lung capacity is the sum of Residual Volume (RV) and Expiratory Reserve Volume (ERV)?

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

    What is the normal value for Expiratory Reserve Volume (ERV)?

    <p>1100 ml</p> Signup and view all the answers

    What is the normal value for functional residual capacity (FRC)?

    <p>2300 ml</p> Signup and view all the answers

    What is the significance of functional residual capacity (FRC)?

    <p>Helps in continuous exchange of gases across the lungs and blood between breaths</p> Signup and view all the answers

    In which conditions is the functional residual capacity (FRC) increased?

    <p>Obstructive lung diseases</p> Signup and view all the answers

    In which conditions is the functional residual capacity (FRC) decreased?

    <p>Restrictive lung diseases</p> Signup and view all the answers

    What is the normal value for total lung capacity (TLC)?

    <p>6000 ml</p> Signup and view all the answers

    Which of the following lung volumes and capacities are not measured completely by a spirometer?

    <p>Residual volume (RV), functional residual capacity (FRC), and total lung capacity (TLC)</p> Signup and view all the answers

    What is the difference between forced vital capacity (FVC) and vital capacity (VC)?

    <p>FVC measures the maximum amount of air exhaled forcefully, while VC measures the maximum amount of air exhaled normally.</p> Signup and view all the answers

    What percentage of the forced vital capacity (FVC) can be exhaled in the majority of cases?

    <p>80%</p> Signup and view all the answers

    How do lung volumes and capacities generally differ between men and women?

    <p>Lung volumes and capacities are usually 20% to 30% less in women than in men.</p> Signup and view all the answers

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