respiratory system Flashcards
1
Q
what does the diaphram do during inhalation ?
A
the diaphram contracts
2
Q
what does the diaphram do during exhalation ?
A
the diaphram relaxes
3
Q
what do nasal hairs do ?
A
- They act as filter and keep dust and dirt out
- They also maintain humidity
4
Q
what do turbinates/nasal conchae do ?
A
- Air conditioning (temperature and humidity)
- Filtration (mucis and cilia covred large area)
- Support of the olfactory system
5
Q
what is pulmunaru surfactant ?
A
- a detergent like substance
- secretd by brochiolar Ckara cells and akveolar Type II cells
- Thin layer on alveolar surface
5
Q
what is pulmunaru surfactant ?
A
- a detergent like substance
- secretd by brochiolar Ckara cells and akveolar Type II cells
- Thin layer on alveolar surface
6
Q
what is pulmunary surfactant ?
A
- a detergent like substance
- secretd by brochiolar Ckara cells and akveolar Type II cells
- Thin layer on alveolar surface
7
Q
what is the role of pulmunary surfactant ?
A
- reduces surface tention
8
Q
what is surface tention ?
A
strong force trying to minimise surface area
9
Q
what can surface tention cause ?
A
- can cause alveolar sacs to collapse
- infantile respiratory distress syndrome
