Science Quiz / Airway Resistance & Work of Breathing

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Can you name the Airway Resistance & Work of Breathing ?

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T/F: As the lungs deflate, airway resistance is increased exponentially due to a decrease in the radii of the airways.
______ (restrictive or destructive) disorders are characterized by a increase in residual volume.
If the length of airway decreases, what would happen to the flow of air? (increases or decreases)
T/F: In the pulmonary system, the sympathetic nervous system causes bronchoconstriction through epi and noreepinephrine, whil parasympathetic causes bronchodilation through ACH.
The air:water surface tension contributes what percentage to lung recoil properties?
Which pneumocytes produce surfactant?
Surfactant decreases the air:water surface tension by a factor of about ___.
sympathetic agonist used to treat asthma
According to LaPlaces Law, an increase in surface tension causes a ____ ( increase or decrease) in the pressure required to hold it open.
type of asthma that is exercise or cold induced
More surfactant causes a _____ in lung compliance.
In absence of surfactant, what would happen to lung compliance?
In an obstructive disorder, the FEV1 value is ____ (higher or lower) than normal.
In an restrictive disorder, the FEV1/FVC ratio is ____ (higher or lower) than normal.
Pleural Pressure must be ____ cm H20 or beyond to open an airway.
type of asthma that is characterized by extensive inflammation due to histamines, prostaglandins, or leukotrienes.
An increase in the pressure gradient would ____ air flow.
T/F: Reduction in surface tension, reduces the amount of pressure required to keep an alveolus open.
_____ adrenergic receptors can be found on the bronchi, causing bronchodilation.
type of asthma that is induced by allergens
T/F: There is a very high resistance to flow in the alveoli
Surfactant creates a ____:air interface which reduces surface tension.
T/F: Both obstructive and restrictive disorders have a decrease in vital capacity.
Main resistor of the lungs
Type of flow with a reynolds number between 2000 -4000
the difference in the pressure volume curves for inspiration and expiration is known a _____.
In an obstructive disorder, the FEV1/FVC ratio is ____ (higher or lower) than normal.
Type of flow with a reynolds number > 4000
The elasticity of lung tissue contributes what percentage of lung recoil properties?
T/F: It is easier to open a closed airway than to hold it open.
QuestionAnswer
Stage of inspiration characterized by a decrease in pleural pressure but no change in lung volume
Reduction in surfactant causes a ____ in lung recoil.
If the radius of a respiratory airway is decreased by 2, then the flow would be decreased by a factor of ___.
______ diseases are characterized by the inability to properly inflate the lungs. They include pulmonary fibrosis and edema.
If the viscosity of air increases, what would happen to the flow of air? (increases or decreases)
Stage of inspiration that is marked by an increase in the transpulmonary pressure gradient that has diminishing returns due a decrease in lung comliance
The flow of air in the lungs stops when the lungs reach the _____ volume, where resistance is very high.
patients have chronic cough with sputum production. Have severe inflammation with airway obstruction. Severe Hypoxemia and Hypercapnea
major site of airway resistance
T/F: Work on expiration only occurs in pathological processes.
Stage of inspiration characterized by a decrease in pleural pressure and an increase in lung volume
______ (restrictive or destructive) disorders are characterized by a low compliance/ high recoil.
Which variable of Poisuelle's Law influences resistance the most?
T/F: The elasticity of the lungs is influenced by elasticity of the lung tissue and surface tension of the air:water interface.
Premature babies born before 28 weeks present with ____ due to a lack of surfactant.
What is the pressure (cm H20) required to open an alveolus during tidal volume breathing?
As we move toward a lower lung volume, airway resistance will _____ (increase or decrease) exponentially.
Type of flow with a reynolds number < 2000
______ (restrictive or destructive) disorders are characterized by high compliance/low recoil.
normal percentage of a FEV1/FVC ratio
Preemies born before ____ weeks have collapsed alveoli due to no lung surfactant and high lung recoil.
______ (restrictive or destructive) disorders are characterized by a decrease in total lung capacity.
According to LaPlaces Law, an increase in airway/ alveolar radius causes a ____ ( increase or decrease) in the pressure required to hold it open.
the maximal amount of air that can be forcefully exhaled
patients have a reddish complexion. They hyperventilate, and are usually thin with pursed lips. Experience some hypoxemia but do not become hypercapnic
______ diseases are characterized by the inability to deflate the lungs. They include emphysema, asthma and COPD
the amount of air that can be forcefully exhaled within one second
In an restrictive disorder, the FEV1 value is ____ (higher or lower) than normal.
What anatomical feature of the segmental bronchi contributes to the high resistance?

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