WorksheetsGaseous Exchange
Total questions: 12
Worksheet time: 6mins
What is diffusion?
the active movement of a substance against its concentration gradient
the net movement of a substance from an area of low to higher concentration
the net movement of a substance from an area of high to lower concentration
the passive movement of a substance against its concentration gradient
Where does gaseous exchange occur in mammals?
alveoli
villi
small intestine
heart
How are alveoli adapted for gaseous exchange?
they provide a long diffusion pathway between the lungs and the blood
they are in close contact with the lung capillaries
their walls are made up of multiple cell layers
they have a small surface area for diffusion
Which of these is NOT an adaptation of leaves for gaseous exchange?
they are flat to increase the surface area
they have internal airspaces next to cells
they have small holes on their surface called stomata
they are thick to maximise diffusion pathway
Through what organ does air move into the lungs?
the trachea
the alveoli
the diaphragm
What are the tiny air sacs in the lungs called?
Ravioli
Bronchioles
Alveoli
What are the products of aerobic respiration?
Carbon dioxide and water
Lactic acid
Oxygen and glucose
Where does respiration happen?
Cell membrane
Mitochondria
Nucleus
What does the trachea divide into?
Alveoli
Two bronchi
Bronchioles
What happens to the diaphragm when you breathe in?
Contracts and moves upwards
Relaxes and moves downwards
Contracts and moves downwards
Which organ do fish use for gas exchange?
Lungs
Skin
Gills
Mouth
What opening allows plants to undergo gaseous exchange?
Guard cells
Cilia
Villi
Stomata
