Respiratory Physiology Flashcards
1
Q
Lung enclosed in
A
thoracic cavity
2
Q
Bronchioles
A
- control air flow
- smooth muscle
- constrict or dilate
- decides whether we are sending air flow to alveoli
3
Q
Alveoli
A
- gas exchange
- thin-walled
- large SA
- fine elastic fibers
- collagen
4
Q
Pores of Kohn
A
- connect adjacent alveoli
- equalize air pressure
5
Q
Lung compliance anf recoil determined by
A
elastin and collagen
6
Q
Type I alveoli cells
A
- make up wall (single cell thickness)
- thin for difussion -
7
Q
Type II cells
A
- Secrete surfactant
- decrease Surface tension
8
Q
Respiration
A
Ventilation
( air in and out of lung)
External respiration (gas exchange between alveoli and blood)
Gas transport
Internal Respiration (gas exchange between blood and tissues)
9
Q
2 phases of breathing
A
INSPIRATION
EXPIRATION
depends on pressure differences (pressure gradient)
10
Q
Respiratory Pressures relative to
A
Atmospheric Pressure
11
Q
Inter alveolar pressure
A
In alveoli
12
Q
Intra-pleural pressure
A
pleural space
13
Q
transpulmonary pressure
A
difference
