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- 1. Multiple Choice
When CO² concentration in blood increases breathing becomes
Shallower and slow
There is no effect on breathing
Slow and deep
Faster and deeper
- 2. Multiple Choice
During inspiration , the sternum moves
Backward and downward
Backward and upward
Forward and upward
Forward and downward
- 3. Fill in the Blank
The vital capacity of human being is about
- 4. Multiple Choice
What would happen if human blood becomes acidic ( low pH ) ?
Oxygen carrying capacity of haemoglobin increases
Oxygen carrying capacity of haemoglobin decreases
RBCs count increases
RBCs count decreases
- 5. Fill in the Blank
Amount of O² normally carried by 100mL of pure blood is
- 6. Multiple Choice
The chemical formula of oxyhaemoglobin is
Hb(O2)4
Hb(O3)4
H2B2O4
H3B2O8
- 7. Multiple Choice
Residual air mostly occurs in
Alveoli
Bronchus
Nostrils
Trachea
- 8. Multiple Choice
The majority of CO2 produced by body cells is transported to the lungs
As carbonates
Attached to haemoglobin
Dissolved in the blood
Turgid pressure
- 9. Multiple Choice
A spirometer can be used to directly measure
Inspiratory capacity
Residual volume
Total lung capacity
None
- 10. Multiple Choice
The most characteristic feature of haemoglobin is
Its red colour
Presence of iron
Its ability to combine reversibly with oxygen
Presence of basic protein globin
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