Part 2 Flashcards
(14 cards)
What is between the visceral and parietal pleura that keeps the lung inflated against the chest wall?
Negative Pressure
Negative pressure varies between?
-5 and -7.5 cm H20
Alveolar pressure is sub atmospheric during?
Inspiration
Alveolar pressure is supra-atmospheric during?
Expiration
The difference between alveolar pressure and pleural pressure is?
Transpulmonary Pressure
What does transpulmonary pressure measure?
Recoil tendency of lungs
Transpulmonary pressure peaks at the end of?
Inspiration
Change in volume divided by change in pressure is equal to?
Compliance of the lung
At the onset of inspiration the pleural pressure changes at a faster rate than lung volume. This is known as?
Hysteresis
It’s easier to inflate a saline filled lung than an air filled lung because?
Surface tension forces have been eliminated in the saline filled lung.
The effect of the thoracic cage on the lung reduces compliance by about 1/2 around?
Functional Residual Capacity (at the end of normal inspiration)
Compliance is greater reduced at?
High or Low Lung Volumes
When we take a breath in what happens?
Airway resistance increases
The greatest resistance to airflow is through the?
Nasal Passages