Respiratory system Flashcards
1
Q
Passage of air
A
Nose -> Nasal cavaity->Laryx->Bronchi->Bronchioles ->alveloi
2
Q
Efficiency of gas exchange
A
- Good lung ventilation
- Moist lining
- High amount of red blood cells and myoglobin
- Constant blood flow
- Short diffusion distances
3
Q
Inspiration
A
Ribs move up and outwards. Diaphragm contracts and pulled flat. Pressure decreases. Thoracic cavity volume increase. External Intercostal muscles contract.
4
Q
Muscles used in inspiration during exercise
A
Diaphragm, external intercostals, sternocleiodmastoid, scalenes, pectoralis minor
5
Q
Expiration
A
Ribcage falls, diaphragm relaxes, returns to dome shape. Thoracic cavity volume decreases and pressure increases. Passive diagram and external intercostals relax.
6
Q
Muscles used during exercise for expiration
A
Internal intercostals, abdominals
7
Q
Tidal volume
A
500ml at rest. It is the volume of air breathed in or out per breath. It increased during exercise
8
Q
A
