Session 2: Ventilation And Lung Mechanics Flashcards
1
Q
Is tidal inspiration active or passive?
A
Active
2
Q
Is tidal expiration active or passive?
A
Passive
3
Q
What muscles contract during inspiration?
A
Diaphragm
External intercostal muscles
4
Q
Why does air move into the lungs in inspiration?
A
The thoracic cavity expands and so pressure in the lungs drops to below atmospheric - air is pulled in to equalise pressure
5
Q
What is the resting end expiratory level?
A
The volume of air in the lungs after a passive exhalation (also called functional residual capacity)
6
Q
What is the resting end expiratory level determined by?
A
The balance of elastic forces of the chest wall vs the those of the lung
