BN507 EXAM QUESTIONS AND ANSWERS WITH COMPLETE
SOLUTIONS VERIFIED GRADED A++
function of respiratory system
provide a series of structures that conduct and provide surface area for the exchange of
respiratory gases between air and blood
upper resp. tract
1. nasal cavity
2. pharynx
3. larynx
lower resp. tract
1. lungs
2. bronchi
3. trachea
conducting zone
- nasal cavity to bronchioles
- lined with resp. mucosa
- moisturises air (mucous secretions)
- cleanses air (traps & removes particles)
- warms air (radiation of heat from blood)
respiratory zone
, - lined with resp. membrane
- permits gas exchange
- includes resp. bronchioles & alveoli
respiration
the movement of respiratory gases into and out of the blood
- occurs via diffusion
internal respiration
pulmonary gas exchange (between air & blood)
- CO2 moves out of the blood
- O2 moves into the blood
external respiration
tissue gas exchange (between blood & body tissues)
- CO2 moves into blood
- O2 moves out of blood
inspiration (pulmonary ventilation)
1. inspiratory muscles contract
2. thoracic cavity expands
3. lungs stretch
4. lung volume increases
5. lung pressure decreases
6. air moves into lungs
expiration (pulmonary ventilation)
SOLUTIONS VERIFIED GRADED A++
function of respiratory system
provide a series of structures that conduct and provide surface area for the exchange of
respiratory gases between air and blood
upper resp. tract
1. nasal cavity
2. pharynx
3. larynx
lower resp. tract
1. lungs
2. bronchi
3. trachea
conducting zone
- nasal cavity to bronchioles
- lined with resp. mucosa
- moisturises air (mucous secretions)
- cleanses air (traps & removes particles)
- warms air (radiation of heat from blood)
respiratory zone
, - lined with resp. membrane
- permits gas exchange
- includes resp. bronchioles & alveoli
respiration
the movement of respiratory gases into and out of the blood
- occurs via diffusion
internal respiration
pulmonary gas exchange (between air & blood)
- CO2 moves out of the blood
- O2 moves into the blood
external respiration
tissue gas exchange (between blood & body tissues)
- CO2 moves into blood
- O2 moves out of blood
inspiration (pulmonary ventilation)
1. inspiratory muscles contract
2. thoracic cavity expands
3. lungs stretch
4. lung volume increases
5. lung pressure decreases
6. air moves into lungs
expiration (pulmonary ventilation)
