Breathing — Question Bank (Cambridge) — Cambridge IGCSE Physics 0625 Revision Notes & Topical Questions

Cambridge Lower Secondary Stage 8

Question 1
Paper Ref: 0610/22_Summer_2022_Q20

What happens at the start of inspiration?
internal external
intercostal intercostal diaphragm
muscles muscles
volume
of thorax
contract relax contracts increases
contract relax relaxes decreases
relax contract contracts increases
relax contract relaxes increases

Options:
A
B
C
D
Correct Key: C

Question 2
Paper Ref: 0610/21_Winter_2021_Q20

What causes the air pressure in the lungs to decrease during breathing in?
A
B
Cc
D
contraction of the external intercostal muscles and diaphragm
expansion of the lungs causing a decrease in the volume of the alveoli
outward movement of the rips and upward movement of the diaphragm
higher pressure in the atmosphere than in the lungs causing the alveoli to expand

Options:
A
B
C
D
Correct Key: A

Question 3
Paper Ref: 0610/21_Winter_2025_Q17

Which muscles in the breathing system contract during inspiration?
A external intercostal and diaphragm only
B_ external intercostal and internal intercostal only
C_ external intercostal, internal intercostal and diaphragm
D
internal intercostal and diaphragm only

Options:
A
B
C
D
Correct Key: A

Question 4
Paper Ref: 0610/22_Summer_2023_Q20

Different stages in the process of expiration are listed.
1
2
3
4
Rib cage moves downwards and inwards.
Volume of thorax decreases and pressure in lungs increases.
Air is pushed out of lungs.
Diaphragm and external intercostal muscles relax.
What is the correct order of these stages?
A
B
Cc
D
1372534
137475253
453>2 → 1
45175253

Options:
A
B
C
D
Correct Key: D

Question 5
Paper Ref: 0610/23_Winter_2025_Q18

Which changes cause expiration?
external
intercostal muscles
diaphragm
00 WwW YP
contract
contract
relax
relax
relaxes and moves down
relaxes and moves up
relaxes and moves down
relaxes and moves up

Options:
A
B
C
D
Correct Key: D

Question 6
Paper Ref: 0610/21_Summer_2024_Q23

What are the functions of the diaphragm and the cilia in the human gas exchange system?
contracts to cause breathing in carry mucus to the throat
contracts to cause breathing out trap bacteria from the air
relaxes to cause breathing in filter dust from the air
relaxes to cause breathing out produce mucus

Options:
A
B
C
D
Correct Key: A

Question 7
Paper Ref: 0610/12_Spring_2024_Q26

Which structure in the breathing system has the thinnest wall?
>
alveolus
B bronchiole
C bronchus
D
trachea

Options:
A
B
C
D
Correct Key: A