Lesson T1.4.1
T1.4.1 The human gas exchange system Quiz: KS3 Biology, Unit 1
20 questions
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Lesson T1.4.1, The human gas exchange system: 20 multiple choice questions for the KS3 Biology (National Curriculum), Unit 1: Structure and function of living organisms, written with Revision Ninja.
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The 20 questions
-
Where does gas exchange take place inside the human lungs?
- Alveoli
- Trachea
- Bronchi
- Bronchioles
-
Which tube carries air from the throat towards the lungs?
- Aorta
- Oesophagus
- Urethra
- Trachea
-
Which tubes carry air directly from the trachea into the lungs?
- Capillaries
- Alveoli
- Bronchi
- Vena cava
-
What structural adaptation helps alveoli exchange gases rapidly?
- Dry surfaces
- Waxy layers
- Thick walls
- Thin walls
-
What is the primary function of cilia in the human airways?
- Absorb oxygen gas
- Produce sticky mucus
- Sweep mucus upwards
- Filter large dust
-
What is the main role of the mucus lining in the airways?
- Trap pathogens
- Absorb oxygen
- Digest bacteria
- Warm the air
-
Why are capillaries wrapped around each alveolus?
- Produce red cells
- Warm the lungs
- Pump the blood
- Enable gas exchange
-
What is the main function of the diaphragm during ventilation?
- Change chest volume
- Pump blood around
- Exchange oxygen gases
- Filter dust particles
-
Why must the inner lining of the alveoli remain moist?
- Gases dissolve first
- Prevent cell growth
- Stop dust sticking
- Generate water vapour
-
Why do alveoli maintain an extensive capillary network?
- Maintain concentration gradients
- Store extra blood
- Produce more oxygen
- Slow blood flow
-
Which airway is the smallest tube that ends in the alveoli?
- Bronchioles
- Trachea
- Bronchi
- Diaphragm
-
Why is the trachea supported by rings of cartilage?
- Absorb warm heat
- Prevent airway collapse
- Help expand lungs
- Trap dust particles
-
Which gas diffuses from the alveoli into the blood?
- Nitrogen
- Oxygen
- Carbon dioxide
- Water vapour
-
Why are lungs made of many tiny alveoli rather than large sacs?
- Maximise surface area
- Store more blood
- Speed up breathing
- Increase volume space
-
Why does the human gas exchange system need a large surface area?
- Sufficient oxygen diffusion
- Lower chest pressure
- More carbon storage
- Faster heart rate
-
What is the correct path of air into the lungs?
- Alveoli to bronchi
- Trachea to bronchi
- Bronchi to trachea
- Bronchioles to trachea
-
Which organs carry out gas exchange in humans?
- The lungs
- The kidneys
- The heart
- The liver
-
What is the origin of the carbon dioxide removed by the lungs?
- Photosynthesis waste
- Protein digestion
- Cellular respiration
- Water breakdown
-
What defines a biological gas exchange surface?
- Site of diffusion
- Blood production area
- Muscle contraction site
- Site of digestion
-
Which gas is absorbed into the blood during human pulmonary gas exchange?
- Hydrogen
- Nitrogen
- Oxygen
- Methane
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