Diffusion is the net movement of particles in and out of a cell from a high to a low concentration.
Ficks Law is..
Rate of diffusion = (area of diffusion x difference in concentration ) / (thickness of surface over which diffusion occurs)
Rate of Diffusion is affected by;
- Surface Area, the greater the surface area the the greater the rate of diffusion.
- Thickness, of the surface. The thinner the surface the shorter pathway across the surface area meaning greater rate of diffusion.
- Concentration Gradient, the greater the difference in concentration the greater rate of diffusion.
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