Saturday, January 21, 2012

AP bio: Factors Affecting Cell's Rate of Diffusion

(Based on the simulation on this site: http://www.mhhe.com/biosci/genbio/biolink/j_explorations/ch02expl.htm.)

When the simulation begins, the cell has a surface area of 3 and a relative diffusion rate of 1.  When I increased the villi percent of the cell surface area, there was no effect on the relative diffusion rate.  When I cell and the dimple percent of the cell surface area, there was no effect either.  However, when I increased the radius from 1X to 10X, the relative diffusion rate decreased to 0.10..  Also, when I increased the cell shape from a ratio of 1:1 to 3:1, the relative diffusion rate increased to 2.08.  Therefore, it is supported that an increase in radius means a decrease in a cell's rate of diffusion and an increase in the cell shape ratio means an increase in the cell's rate of diffusion.

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