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Checkpoint Biology 0893

Grade 6 - Unit 1: Cells and organisms

0/11 Dr Dabour Hub Science Diagram and Course Material

Grade 6 - Unit 4: Living organisms and classification

0/12 Dr Dabour Hub Science Diagram and Course Material

Grade 6 - Unit 7: Microorganisms and food webs

0/11 Dr Dabour Hub Science Diagram and Course Material

Grade 7 - Unit 1: Breathing and respiration

0/12 Dr Dabour Hub Science Diagram and Course Material

Grade 7 - Unit 4: Ecosystems

0/10 Dr Dabour Hub Science Diagram and Course Material

Grade 7 - Unit 7: Nutrition, health and movement

0/10 Dr Dabour Hub Science Diagram and Course Material

Grade 8 - Unit 1: Cells and organisms

0/10 Dr Dabour Hub Science Diagram and Course Material

Grade 8 - Unit 4: Living organisms and classification

0/12 Dr Dabour Hub Science Diagram and Course Material

Grade 8 - Unit 7: Microorganisms and food webs

0/10 Dr Dabour Hub Science Diagram and Course Material
Quiz

1.1 The Human Respiratory System

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Human Respiratory System Checkpoint Biology quiz: free practice for Cambridge Checkpoint Biology 0893. Work through this Human Respiratory System Checkpoint Biology quiz and get instant feedback on every answer. If you get stuck, review the 4.1 The human respiratory system lesson. More practice: Cambridge Checkpoint Biology 0893 — all units. Syllabus: Cambridge Lower Secondary programme.

  • Questions count: 50
  • Passing grade: B+
  • Time limit:
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1.
IGCSE Biology 11.1 Gas exchange in humans WITH ALVEOLI - Question 9
IGCSE Biology 11.1 Gas exchange in humans WITH ALVEOLI - Question 9
A
B
C
D
2.
Air travels from the trachea into the lungs through the:
Bronchi
Oesophagus
Alveoli first
Diaphragm
3.
Each substance in cigarette smoke is paired with its effect. Which pairing is correct?
Nicotine – reduces the oxygen the blood can carry
Carbon monoxide – is what makes smoking addictive
Tar – makes the cilia beat faster and clean better
Tar – damages cilia and can cause lung cancer
4.
During an asthma attack, the muscles around the bronchioles tighten. Why does this make the person short of breath?
The bronchioles fill up with cartilage rings
The narrower bronchioles let less air reach the alveoli
The alveoli stop producing any mucus to trap the dust and germs
The ribs can no longer protect the lungs
5.
Karim's result for trial 3 does not fit the pattern. What is the most likely reason?
His lungs had become larger by the time of trial 3
Some breath escaped around the tube
He took a much deeper breath in before trial 3
The water was warmer, so it soaked up his breath
6.
IGCSE Biology 11.1 Gas exchange in humans WITH ALVEOLI - Question 2
IGCSE Biology 11.1 Gas exchange in humans WITH ALVEOLI - Question 2
A
B
C
D
7.
IGCSE Biology 11.1 Gas exchange in humans WITH ALVEOLI - Question 7
IGCSE Biology 11.1 Gas exchange in humans WITH ALVEOLI - Question 7
A
B
C
D
8.
The diagram shows the human respiratory system with six parts labelled A to F. Which letter labels the part that contracts and flattens when you breathe in, making the chest bigger?
Dr Dabour Hub Science Diagram and Course Material
Letter F
Letter E
Letter A
Letter D
9.
Inside each lung, the bronchus divides again and again into thousands of small bronchioles. Why is this branching useful?
It makes the lung heavy enough to stay still
It stops the lung from filling with any air
It lets the bronchioles do the gas exchange
It carries air to every part of the lung
10.
Each lung contains millions of tiny alveoli rather than one large air space. What is the advantage?
The lungs become heavier and better protected
Each tiny alveolus can hold much more air than one big space could
Air moves more slowly, so it stays in the lungs longer
A huge surface area for oxygen to diffuse into the blood
11.
Farid used these results to claim that swimming training gives every person a larger lung volume. Which is the best evaluation of his claim?
It is proven, because every swimmer breathed out more than every non-swimmer
It is wrong, because swimmers breathe less often than non-swimmers do
It is proven, because the swimmers' mean is about 0.8 litres higher
It is weak – only three people per group
12.
IGCSE Biology 11.1 Gas exchange in humans WITH ALVEOLI - Question 3
IGCSE Biology 11.1 Gas exchange in humans WITH ALVEOLI - Question 3
A
B
C
D
13.
A clinic surveyed 300 adults. Which is the best explanation for the difference between the two groups?
Smoke paralyses cilia, so mucus builds up and must be coughed up
Smokers make no mucus at all, so their airways feel dry
Non-smokers cough less because they have no cilia or mucus in their airways
The groups were different sizes, so no comparison is possible
14.
The diagram shows cells lining the trachea, covered with a layer of mucus containing dust. Which arrow shows the direction the cilia move the mucus, and why?
Dr Dabour Hub Science Diagram and Course Material
X – dust and germs are carried up and away from the lungs
Y – the mucus carries dust down so the alveoli can absorb it
Y – mucus must reach the alveoli to keep them moist
X – the cilia push fresh air up towards the throat
15.
Which statement correctly describes the difference between breathing and respiration?
Breathing moves air in and out; respiration releases energy in cells
Breathing releases energy in cells; respiration moves air in and out
Breathing and respiration are two words for the same process
Breathing happens in the lungs; respiration happens only in the nose
16.
After working for many years in dusty air, a coal miner's lungs contain black dust. Which is the best explanation?
Coal dust is made inside the lungs from the oxygen the miner breathes in
The miner had no cilia or mucus at all in his airways from birth
So much dust was breathed in that mucus and cilia could not remove it all
Dust can only reach the lungs through the blood, not through the airways
17.
Each feature of the lungs is paired with how it helps. Which pairing is correct?
Thin alveolus walls – short distance for gases to diffuse
Cartilage rings – trap dust and germs from the air
Many capillaries – make mucus to line the airways
Moist lining – holds the trachea open
18.
Year 7 students are building a model to show how cilia and mucus clean the airways. Which design shows the idea best?
A sponge that soaks up grains of sand and holds them at the bottom
A moving belt of sticky tape that catches grains of sand and carries them upwards
A plastic tube with a fan blowing sand down towards two balloons
A sieve with large holes that lets all of the sand fall through
19.
Each problem is paired with a likely result. Which pairing is correct?
Alveoli damaged – more dust reaches the trachea
Nose hairs removed – the trachea collapses
Cilia paralysed – mucus and dust build up in the airways
Bronchioles narrowed – more oxygen is absorbed
20.
Each part of the respiratory system is paired with a job. Which pairing is correct?
Trachea – the place where gas exchange happens
Bronchiole – carries air through the lung to the alveoli
Diaphragm – the bones that protect the lungs
Alveolus – a tube held open by rings of cartilage
21.
Samira rested, then skipped for four minutes, then rested again while a partner counted her breaths each minute. Which statement best explains the graph?
Dr Dabour Hub Science Diagram and Course Material
She skipped from 6 to 10 minutes; breathing slowed as muscles needed less air
She skipped from 0 to 2 minutes; her lungs grew larger during the skipping
She skipped from 2 to 6 minutes; breathing sped up to bring in more oxygen
She skipped from 2 to 6 minutes; breathing sped up to take in more carbon dioxide
22.
The diagram shows alveoli at the end of a bronchiole, with a blood capillary. In one lung disease, the wall labelled W becomes much thicker. Why does this reduce gas exchange?
Dr Dabour Hub Science Diagram and Course Material
Less air can enter the trachea and the two bronchi above it
Gases have further to diffuse between air and blood
The capillary can carry more oxygen away from W
The cilia can no longer sweep mucus off the wall
23.
A teacher demonstrated a smoking machine that draws smoke through cotton wool. What do the results suggest about a smoker's airways?
Tar collects only in the cotton wool, never in the lungs
Smoke makes the airways cleaner, as it removes mucus
More cigarettes leave more tar, which damages the cilia
The first cigarette leaves the most tar, so later ones are safe
24.
Three students measured round their chests after breathing out fully and after breathing in fully. What explains why every chest measurement increased?
The lungs filled with air and pushed out the ribs
The intercostal muscles moved the ribs up and out
The diaphragm relaxed and moved up into the chest
The trachea widened, letting more air into the chest
25.
On a cold, dusty day, why is it better for Musa to breathe in through his nose than through his mouth?
The nose warms, moistens and filters the air
The nose adds extra oxygen to the air
The nose removes carbon dioxide from the air
The nose makes the air colder and drier
26.
Which list shows the order in which air passes through the respiratory system when you breathe in?
Nose, bronchi, trachea, alveoli, bronchioles
Mouth, bronchioles, bronchi, trachea, alveoli
Nose, trachea, alveoli, bronchioles, bronchi
Nose, trachea, bronchi, bronchioles, alveoli
27.
Match the term to its correct meaning: air sac
the kind of respiration that uses oxygen and produces carbon dioxide as a waste product
the strong rings around the trachea that stop it collapsing
one of the two tubes branching from the trachea, one going to each lung
the tiny structure at the end of a bronchiole where oxygen enters the blood
28.
Match the term to its correct meaning: respiration
a series of chemical reactions that happens inside every living cell
one of the two tubes branching from the trachea, one going to each lung
the kind of respiration that uses oxygen and produces carbon dioxide as a waste product
the sheet of muscle below the lungs that helps move air in and out
29.
Which term is described as: the kind of respiration that uses oxygen and produces carbon dioxide as a waste product?
aerobic respiration
bronchus
bronchiole
air sac
30.
Leaving out the anomalous trial, Karim's mean lung volume is _____.
2.8 litres
3.2 litres
1.9 litres
3.1 litres
31.
The tiny hair-like structures that sweep mucus up the airways towards the throat are called _____.
alveoli (one is an alveolus)
cilia (one is a cilium)
bronchi (one is a bronchus)
capillaries (blood vessels)
32.
Use the table. The missing job of the bronchioles is to _____.
exchange gases with the blood in capillaries
protect the lungs from being crushed
hold the trachea open with cartilage
spread air through the lung to the alveoli
33.
The lungs are protected from being crushed by the _____, which surround the chest.
rings of cartilage
sheets of mucus
branching bronchioles
ribs of the ribcage
34.
Smoking paralyses the cilia, so mucus containing dust and germs stays in the airways. True or false?
False – smoking makes cilia beat faster
False – cilia are found only in the nose
True, but only in people who smoke cigars
True – this is why smokers get more chest infections
35.
The walls of the alveoli are thick so that they are strong and are not damaged by the air. True or false?
True – thick walls protect the alveoli from dust and germs in the air
False – they are one cell thick, so gases diffuse quickly
True, because the walls contain cartilage rings
False – the alveoli do not have any walls
36.
When a person breathes in, their ribs move down and in. True or false?
True – the ribs squeeze the lungs together to suck the air in
True, but only during exercise
False – the ribs never move during breathing
False – the ribs move up and out when breathing in
37.
Cells produce carbon dioxide as a waste product of aerobic respiration. - True or false?
True
False
38.
If a peanut completely blocked one bronchus, no air at all could reach either lung. True or false?
False – each bronchus leads to one lung, so the other still gets air
True – both of the lungs are supplied with air by each one of the bronchi
True, because the bronchi join back together
False – air would then reach the lungs through the ribs
39.
The ribs protect the lungs and also move when a person breathes. True or false?
True – they form a cage that moves up and out and down and in
False – the ribs are fixed and never move
False – the ribs are found below the lungs
True, but they protect only the heart
40.
Using the table, a student says: "The person with emphysema has less oxygen in their blood because their damaged alveoli have a smaller surface area for gas exchange." True or false?
True – less surface area means less oxygen diffuses into the blood
False – the size of the surface area has no effect at all on gas exchange
False – emphysema increases the surface area of alveoli
True, but only because the person breathes more slowly
41.
The lungs are two hollow, empty bags, like balloons. True or false?
True – they are just empty bags that fill up with air when the ribs move
True, but only one lung is hollow
False – they are spongy, full of bronchioles and alveoli
False – they are solid and contain no air at all
42.
Farida writes: "We breathe in because our lungs pull the air in." This is the best scientific explanation. True or false?
True – the lungs act like a muscular pump that sucks air in through the trachea
True, because the lungs are made of muscle
False – chest volume increases, pressure falls and air is pushed in
False – air enters because the diaphragm moves upwards
43.
Aerobic respiration uses carbon dioxide. - True or false?
True
False
44.
Joel looks at the bar chart and says: "This shows that your body takes in all of the oxygen that you breathe in." True or false?
Dr Dabour Hub Science Diagram and Course Material
True – oxygen falls from 21% to 16% as it is all used
False – exhaled air still contains about 16% oxygen
True, because exhaled air is mostly carbon dioxide
False – the body does not take in any oxygen at all
45.
Respiration only happens in cells in your lungs. - True or false?
True
False
46.
Cells produce oxygen as a waste product of aerobic respiration. - True or false?
True
False
47.
The rings of cartilage keep the trachea open and prevent it collapsing. - True or false?
True
False
48.
The blood collects waste carbon dioxide from the cells and takes it to the stomach. - True or false?
True
False
49.
The diaphragm is a sheet of muscle found below the lungs. True or false?
True – it separates the chest from the abdomen
False – it is a bone that protects the heart
False – it is a tube that carries air to the lungs
True, but it is made of cartilage, not muscle
50.
Oxygen moves from the air in the alveoli into the blood by diffusion. True or false?
False – oxygen is pumped into the blood by the heart
False – oxygen moves from the blood into the alveoli
True – it moves from a high to a low concentration
True, but only when a person is exercising
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Part of Grade 7 - Unit 1: Breathing and respiration — see every lesson and quiz in this unit.
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