Respiratory Systems Flashcards
1
Q
Write an equation for the rate of diffusion.
A
Q = D A (Pe - Pi) / L
2
Q
Describe the features of gills.
A
- highly branched and folded extensions (evaginations) to maximise surface area
- thin tissue, minimises diffusion path length
- new medium flows continuously over surfaces
3
Q
What is the role of ‘dead space’ in mammalian airways?
A
- transfer of gases to/from alveoli
- warming and humidifying inspired air
- filtration and removal of foreign material
4
Q
Describe the pathway of oxygen through the lungs.
A
- trachea
- bronchi
- bronchioles
- terminal bronchioles
- respiratory bronchioles
- alveolar
- alveolar sacs
5
Q
What are the consequences of tidal ventilation.
A
- incoming air mixes with ‘used’ gas
- alveoli provide reservoir of oxygen
- ‘dead space’ does not participate in gas exchange
- benefits of dead space: warming/humidifying and protection
6
Q
Write an equation for the minute ventilation of the entire lung.
A
Ve = Vd + Va
7
Q
A
