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1. In order to understand the effect of  cell size on diffusion, complete the following table.


Hypothetical Cells

Surface area

Volume

SA:V ratio

Distance from centre of cell to nearest cell surface

L










L





2. What are the disadvantages for the larger cube-shaped cell compared to the smaller cell?







3. Some cells have very long, Slender extensions. For example, nerve cells that extend from the bottom of your spine all the way down your leg to your foot. Based on your calculations, explain how diffusion can supply enough O2 to this very long slender extension of the nerve cell.





4. Do you think large cells and small cells carry out diffusion and osmosis at the same rate? Why or why

Not?




5. If a cell has a high concentration of something, say, waste, that it wants to get rid of, which do you predict will be able to get rid of the waste sooner – a smaller cell or a large one?




6. Why must large organisms be multi cellular?



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