10 questions🇬🇧English
🫁 Breathing & Gas Exchange – Year 8
Biology · Year 8 (KS3) — lungs, alveoli, the breathing mechanism and the effects of smoking
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Questions
What are the tiny air sacs in the lungs where gas exchange takes place called?
Bronchioles
Alveoli
Bronchi
Capillaries
20s
Which tube, held open by rings of cartilage, carries air from the throat down towards the lungs?
Trachea
Alveolus
Oesophagus
Bronchiole
20s
The trachea splits into two tubes, one going into each lung. What are these two tubes called?
Bronchioles
Bronchi
Capillaries
Alveoli
20s
What does the diaphragm do when you breathe in?
It contracts and domes upwards
It relaxes and flattens
It contracts and flattens
It relaxes and domes upwards
20s
When you breathe in, the intercostal muscles between the ribs contract. How does the ribcage move?
Down and out
Up and in
Up and out
Down and in
20s
During inhalation, what happens to the volume and pressure inside the chest?
Volume increases and pressure decreases
Volume increases and pressure increases
Volume decreases and pressure increases
Volume decreases and pressure decreases
30s
How does exhaled air compare with inhaled air?
No oxygen and more carbon dioxide
Less nitrogen and less water vapour
More oxygen and less carbon dioxide
Less oxygen and more carbon dioxide
30s
The walls of the alveoli are only one cell thick. How does this help gas exchange?
More mucus can trap dust and germs
Gases diffuse across a shorter distance
Air flows into the lungs more quickly
Blood flows past the alveoli more slowly
30s
Smoking can cause emphysema, in which the walls of the alveoli break down. Why does this make people breathless?
The trachea becomes completely blocked
The ribs can no longer move upwards
The diaphragm stops contracting
The surface area for gas exchange is reduced
30s
Which statement correctly describes the difference between breathing and respiration?
Both only happen inside the lungs
They are two names for the same process
Breathing releases energy; respiration moves air
Breathing moves air; respiration releases energy in cells
30s