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