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2 Cards in this Set

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surface area-to-volume ratio
as a cell grows, its volume increases much faster than its surface area does, if a cell were to become very large, the volume would increase much more than the surface area,therefore the surface area would not allow materials to enter or leave the cell quickly enough to meet the cells needs
how the surface-to-volume ratio constrains cell size.
So a cell with a volume of, say...2 has twice the volume of a volume 1 cell, but the surface area isn't doubled. This makes it harder to get things into and out of the cell. water, oxygen needs are doubled, but the transfer site isn't. So the size of the cell is limited to the surface are of the cell membrane that can support the volume inside.
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