Quiz
Airflow-airway resistance and Dynamic compression
Questions in this quiz (5)
1Airway resistance = Flow Resistance - pick the wrong statement
- ALaminar flow in the acinus - low velocity and Reynolds number is low
- BTrachea-bronchi - turbulent flow - high velocity and high Reynolds number
- Cdecrease in the radii of the bronchioles in half, which increases their resistance by 4-fold
- DAirway resistance is the highest in the 3rd to 5th generation bronchi
2Effects of lung volume on airway diameter
- AAirway resistance decreases as lung volume increases during inspiration and vice versa during expiration
- BAirways are elastic so they increase diameter when Pleural pressure goes up
- CThis is why it takes longer to exhale during passive breathing than to inhale
- Dall of the above are correct
3Lung volume and airflow
- AInspiration is effort dependent
- BDuring expiration increase in effort produces increases in flow only during the initial quarter of the expiratory vital capacity
- CDuring expiration at low and moderate lung volumes - flow is maximal and is effort independent
- Dall of the above are correct
4At Equal Pressure Point
- AWhen the pressure in airway is equal to pleural pressure Paw = Ppl
- BDuring Forced expiration - Upstream of EPP (toward alveoli) driving pressure, PA-P mouth - will move air out of the lungs
- CDuring Forced expiration - Downstream of EPP (toward mouth) PA -Ppl
- Dall of the above are correct
5Patients with emphysema have lungs that are easy to inflate, but they don't generate enough elastic recoil pressure to get the air out which causes airways collapse and air trapping
- ATrue
- BFalse
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- radven
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