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Paper 1
Cell biology
Surface area to volume ratio
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Created by
Ashley mak
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Cards (4)
Relationship between organisms size and their surface area
The
larger
the organism the lower the
surface area to volume ratio
will be
How does the surface area to volume ratio affect the transport of molecules
The lower the surface area:volume the further the
distance
molecules need to travel
Once distance becomes too great
diffusion
alone is not sufficient to transport molecules
Why do larger organisms require specialised exchange surfaces
Exchange surfaces provide larger extra surface area adapted for exchanging substances.
This makes up for the small
surface area:volume
Why do larger organisms require mass transport systems
Diffusion
alone is not sufficient to quickly transport substances long distances