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- 1. Multiple Choice
The diagram below which shows the inner lining of a certain part of the human body. This inner lining can be found in
the trachea.
the air sacs.
the capillaries.
the small intestine.
- 2. Multiple Choice
Which of the following shows the correct sequence of air passage into the lungs?
trachea → larynx → air sacs → bronchi
larynx → trachea → bronchi → air sacs
air sacs → larynx → trachea → bronchi
larynx → bronchi → trachea → air sacs
- 3. Multiple Choice
The exhaled air from our body consists mostly of
carbon dioxide.
nitrogen.
oxygen.
water vapour.
- 4. Multiple Choice
Inhalation occurs from
P to Q
P to R
R to S
R to T
- 5. Multiple Choice
Which of the following features of the respiratory tract helps to warm the inhaled air?
The nasal cavity has a lot of hair.
The lining of the trachea is covered with cilia.
The lining of the respiratory tract is coated with mucus.
The wall of the nasal cavity is richly supplied with capillaries.
- 6. Multiple Choice
The lining of the nasal cavity is covered with a thin film of mucus. What is the importance of the mucus?
It warms up the inhaled air.
It helps remove dust from the incoming air.
It lubricates the passage of air into the respiratory trac.
It helps dissolve oxygen in the inhaled air for gas exchange.
- 7. Multiple Choice
What is the rate of breathing of this person at rest?
10 breaths per minute
12 breaths per minute
18 breaths per minute
24 breaths per minute
- 8. Multiple Choice
Which of the following structures is supported by cartilage?
aorta
oesophagus
bronchus
vena cava
- 9. Multiple Choice
Which of the following correctly describes the functioning of the human breathing system?
The bronchus cannot change its size.
The nasal cavity has hairs to trap dust.
The diaphragm muscle contracts during inhalation.
The lung expels air through its muscular contraction.
- 10. Multiple Choice
The film of water on the surface of human air sacs serves to
warm the incoming air.
moisten the incoming air.
trap dust in the inhaled air.
dissolve the gases in the inhaled air.
- 11. Multiple Choice
The atmospheric pressure is lower at high altitude than at sea level. If someone gets to a place of higher altitude, his breathing rate increases. This is probably due to the fact that
the heartbeat rate of a person is faster at higher altitude.
the percentage of oxygen in air drops at higher altitude.
the metabolic rate of a person is faster at higher altitude.
the amount of oxygen inhaled in each breath of a person is lesser at higher altitude.
- 12. Multiple Choice
Which of the following statements about breathing is correct?
The lungs expand to push the ribs upwards.
The entry of air causes the lungs to expand.
The air pressure inside the lungs keeps decreasing during inhalation.
The contraction of the diaphragm muscles causes the lungs to expand.
- 13. Multiple Choice
In a fire accident, during which period of time in the following graph would a large amount of hot smoke rush into the lungs?
P to R
Q to S
R to T
S to U
- 14. Multiple Choice
Which of the following descriptions about the function of the cilia lining the trachea is correct?
to warm up the incoming air
to moisten the incoming air
to move mucus away from the trachea
to produce mucus to protect the trachea
- 15. Multiple Choice
The table shows the relative amounts of mitochondria, chloroplasts and endoplasmic reticulum in four cell types P, Q, R and S. Which cell type is found in the lining of the air sacs in the lungs?
P
Q
R
S
- 16. Multiple Choice
At which point of time on the graph is the volume of the lung the largest?
P
Q
R
S
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