Exchange surfaces
What Exchange surfaces means in Biology GCSE, as defined for AQA, OCR.
Definitions of Exchange surfaces
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Reference: AQA
Specialised surfaces, such as the alveoli in lungs or villi in the small intestine, that increase the surface area and shorten the diffusion path.
Specialized surfaces with folded membranes that multicellular organisms require, paired with mass-flow transport systems.
Specialised surfaces that large multicellular organisms need because they have a smaller surface area to volume ratio.
Topics that use Exchange surfaces
- Diffusion (AQA GCSE)
- The challenges of size (OCR GCSE)
Related terms
- Surface area to volume ratio
- active transport of minerals
- arteries
- blood plasma
- boundary layer
- compound measures
- Concentration gradient
- Concentration gradients
Using Exchange surfaces in the exam
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