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1. 
How to maintain relatively constant oxygen levels in blood
A.
Inspired air moves from alveolar air into the blood at same rate as consumed by the tissue
B.
Inspired air moves from bronchiolar air into the blood at same rate as consumed by the tissue
C.
Inspired air moves into the blood at a faster rate than consumed by tissue
D.
Expired air moves into the blood at a slower rate than consumed by tissue
2. 
The four processes of external respiration are
3. 
The functions of the respiratory system is
4. 
How are the lungs build?
A.
The right lung is divided into 3 lobes
B.
The left lung is divided into 2 lobes
C.
The left lung is divided into 3 lobes
D.
The right lung is divided into 2 lobes
E.
The left lung is divided into 4 lobes
F.
The right lung is divided into 5 lobes
5. 
What are the four primary pressures associated with ventilation
6. 
interpleural pressure is
A.
the pressure of intrapleural fluid
B.
the pressure of air inside the bronchioles
C.
always negative
D.
always positive
E.
the difference between the transpulmonary pressure and the intra-alveolar pressure
F.
the pressure of air inside the alveoli
7. 
Transpulmonary pressure is
A.
difference between intrapleural pressure and intra-alveolar pressure
B.
difference between air in alveoles and fluid in between the lungs
C.
air pressure in the larynx
D.
difference between pressure in alveoles and blood