AQA GCSE Combined Science Trilogy · 8464
Specification 4.1.3.1 · Paper 1
Revise: Surface area to volume ratios and specialised exchange surfacesA thin barrier provides a short diffusion path, so particles can cross quickly.
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GCSE Combined Science · key term
The distance a substance travels by diffusion between two regions.
Used by AQA
Specification 4.1.3.1 · Paper 1
Revise: Surface area to volume ratios and specialised exchange surfacesA thin barrier provides a short diffusion path, so particles can cross quickly.
Link each adaptation to its effect: a thin barrier shortens the diffusion path; blood flow and ventilation maintain concentration gradients.
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