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IB Biology Topic 6.4
Test Description: Gas Exchange
Instructions: Answer all questions to get your test result.
1) The microscope sacs within the lungs are called
A
Cilia
B
Villi
C
Arteries
D
Alveoli
2) Which type of alveolar cells secrete a surfactant to stop the cells sticking together?
A
Pneumocytes Type III
B
Pneumocytes Type I
C
Pneumocytes Type IV
D
Pneumocytes Type II
3) What type of alveolar cells are especially thin to allow gas exchange?
A
Pneumocytes Type II
B
Pneumocytes Type IV
C
Pneumocytes Type I
D
Pneumocytes Type III
4) What does not happen in inhalation
A
External intercostal muscles contract
B
Diaphragm becomes flat
C
Diaphragm becomes domed shaped
D
Rib cage moves up and out
5) What does not happen in exhalation
A
Diaphragm becomes domed shape
B
Volume within lungs increases
C
Ribs drop down and in
D
External intercostal muscles contract
6) What percentage of lung cancer is caused by smoking?
A
53%
B
87%
C
67%
D
79%
7) What percentage of lung cancer is caused by passive smoking?
A
3%
B
15%
C
4%
D
7%
8) The main branches from the trachea are called
A
Bronchioles
B
Arterioles
C
Bronchi
D
Alveoli
9) Patients with emphysema have
A
Fewer but larger alveoli but with thicker walls
B
Fewer but smaller alveoli with thicker walls
C
More but smaller alveoli with thicker walls
D
Fewer but larger alveoli with thinner walls
10) As volume of lungs increases, the pressure within it
A
Increases
B
Decreases
C
Stays the same
D
Goes up and down in a wild manner
11) The trachea is also known as
A
peristalsis
B
oesophagus
C
the wind pipe
D
gullet
12) Oxygen diffuses into the blood capillaries surrounding the alveoli via
A
Active transport
B
Endocytosis
C
Facilitated diffusion
D
Passive diffusion
*select an answer for all questions
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