Exchange surfaces
What Exchange surfaces means in Combined Science GCSE, as defined for AQA.
Definitions of Exchange surfaces
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Reference: AQA
In organisms these are adapted by having a large surface area, a thin membrane and a good blood supply to maintain steep concentration gradients.
Structures such as the lungs and small intestine that increase the area available for diffusion.
Topics that use Exchange surfaces
- Diffusion (AQA GCSE)
Related terms
- Adaptations of exchange surfaces
- Blood supply
- Cell size and organism size
- Concentration gradient
- Diffusion
- Diffusion and exchange surfaces
- Diffusion distance
- Exchange surface
Using Exchange surfaces in the exam
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