Exchange surfaces (AQA GCSE Biology): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
Why can single-celled organisms exchange materials easily without special exchange surfaces?
Why can single-celled organisms exchange materials easily without special exchange surfaces?
They are small with everything close
Why do multicellular organisms need special exchange surfaces?
Why do multicellular organisms need special exchange surfaces?
Cells inside are far from outside
What happens to the surface area to volume ratio as organisms get bigger?
What happens to the surface area to volume ratio as organisms get bigger?
It gets smaller
Why do single-celled organisms have an advantage with their surface area to volume ratio?
Why do single-celled organisms have an advantage with their surface area to volume ratio?
They have high SA:V ratio
A cube-shaped cell has sides of 1 μm. What is its surface area to volume ratio?
A cube-shaped cell has sides of 1 μm. What is its surface area to volume ratio?
6
How does having a large surface area help exchange surfaces?
How does having a large surface area help exchange surfaces?
Increases rate of exchange
How do exchange surfaces achieve short diffusion distances?
How do exchange surfaces achieve short diffusion distances?
Being just one cell thick
What is the purpose of a good blood supply in exchange surfaces?
What is the purpose of a good blood supply in exchange surfaces?
Keeps concentration gradients high
What are the tiny finger-like structures in the small intestine called?
What are the tiny finger-like structures in the small intestine called?
Villi
What are the millions of tiny air sacs in the lungs called?
What are the millions of tiny air sacs in the lungs called?
Alveoli
What thin structures in fish gills increase the surface area for gas exchange?
What thin structures in fish gills increase the surface area for gas exchange?
Gill filaments
Which type of organism can exchange materials easily without special exchange surfaces?
Which type of organism can exchange materials easily without special exchange surfaces?
Bacteria