Surface Area to Volume Ratio (AQA A-Level Biology): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
Which waste product is removed during material exchange with the environment?
Which waste product is removed during material exchange with the environment?
Carbon dioxide
How does surface area change compared to volume as an organism grows larger?
How does surface area change compared to volume as an organism grows larger?
SA increases by square, V by cube
What is the SA:V ratio of a cube with 4 cm edge length?
What is the SA:V ratio of a cube with 4 cm edge length?
1.5:1
Why can small organisms rely on simple diffusion for material exchange?
Why can small organisms rely on simple diffusion for material exchange?
They have high SA:V ratios
What is the main problem for large organisms with low SA:V ratios?
What is the main problem for large organisms with low SA:V ratios?
Diffusion distances too great
Which adaptation do flatworms use to overcome low SA:V ratios?
Which adaptation do flatworms use to overcome low SA:V ratios?
Flattened shape
Which structure provides a large surface area for gas exchange in mammals?
Which structure provides a large surface area for gas exchange in mammals?
Folded inner surface of lungs
How thick are many specialised exchange surfaces?
How thick are many specialised exchange surfaces?
Just one cell thick
What does selective permeability of exchange surfaces achieve?
What does selective permeability of exchange surfaces achieve?
Allows only specific materials
How does movement of external medium help maintain exchange efficiency?
How does movement of external medium help maintain exchange efficiency?
Maintains concentration gradients