surface area to volume ratio 0.0 / 5 ? Biologyexchange and transportASEdexcel Created by: s.yosCreated on: 03-02-16 19:42 Diffusion is increases by: 1) large surface area 2) steep concentration gradient 3) thin surface membrane 4) heat 5) good blood supply (maintains steep concentration gradient ) 1 of 3 Fick's Law -Measures rate of diffusion - 'a' means proportional to 2 of 3 Unicellular organisms - Do not have specialised gas exchange surfaces -Use diffusion -The smaller something is, the smaller the surface area & the bigger the surface area:volume ratio. -All parts of organism supplied w/ oxygen because diffusion distance is short 3 of 3
Organisms exchange substances with their environment AQA AS Biology PART 1 of 5 TOPICS: Surface are to volume ratio 0.0 / 5
2.1.1 The Relationship between an Organism's Size and its Surface Area to Volume Ratio 3.0 / 5 based on 1 rating
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