Intro Lung MechANICS Flashcards Preview

PHYSIOLOGY > Intro Lung MechANICS > Flashcards

Flashcards in Intro Lung MechANICS Deck (8)
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1

inspiration

- diaphragm
- active process
- contraction of diaphragm
- process involved LUNG RECOIL and INTRAPLEURAL PRESSURE

2

expiration

- passive process
- relaxation

3

LUNG RECOIL
lung size is proportional to lung recoil

- force/tension that develop in the wall of the lung as the lung expands
- collapsing force

4

intrapleural pressure

- pressure in the thin film of fluid between the lung and the chest wall
- subatmospheric pressure is NEGATIVE force expand the lungs
- subatmospheric pressure is POSITIVE force to collapse the lung

5

intrapleural pressure

- is always NEGATIVE
- EXPAND THE LUNG

6

intrapleural pressure > lung recoil NEGATIVE

= LUNG EXPANDS

7

intrapleural pressure

= LUNG COLLAPSE

8

intrapleural pressure = lung recoil EQUILIBRIUM, STABLE STATE

= LUNG SIZE CONSTANT