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Surface Area to Volume Ratio investigation.
Member rating: No Rating | Words: | Submitted: Thu Jan 13 2005
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Surface Area to Volume Ratio investigation Introduction: * All organisms carry out exchange between themselves and their environment. * There is also exchange by diffusion. The rate of diffusion is affected by: - Temperature - Surface Area - Steepness of the concentration gradient - Distance over which diffusion takes part The larger the surface area or the steeper the concentration gradient or the thinner the membrane of diffusion barrier, the faster is the diffusion. - Diffusion becomes less efficient as the surface area does not increase to an extent that would satisfy the increased demands of a larger volume cell. - As the length of the sides of a cubodial cell increase then: Surface area and volume increase exponentially, volume increases at a greater pace, surface area/volume ratio decreases exponentially. As cell sizes increase, the surface area does not increase in proportion to the volume. Example by means of a cube. * All organisms need to exchange substances such...
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