mechanics of breathing Flashcards
1
Q
the greater the difference in pressure….
A
the faster air will flow
2
Q
in order to get air into the lungs what does the pressure have to be like
A
pressure of atmosphere needs to be higher than lungs
3
Q
how to reduce pressure of air in the lungs
A
increasing the volume of the thoracic cavity will reduce pressure of air in the lungs
vice versa
4
Q
inspiration
A
- ribcage moves upwards and outwards
- diaphragm contracts and is pulled flat
5
Q
expiration
A
- ribcage falls
- diaphragm relaxes and rises to dome shaped position
6
Q
muscles used during inspiration at rest
A
diaphragm
external intercostals
7
Q
muscles used during inspiration during exercise
A
diaphragm external intercostals sternocleidomastoid scalenes pectoralis major
8
Q
muscles used during expiration at rest
A
diaphragm
external intercostals
9
Q
muscles used during expiration during exercise
A
internal intercostals
abdominals
