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Essay

Diffusion

Essay specific features

 

Issue:

Miscellaneous

 

Written by:

Sibyl B

 

Date added:

November 29, 2010

 

Level:

University

 

Grade:

A

 

No of pages / words:

7 / 1791

 

Was viewed:

2010 times

 

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Essay content:

One such process that is necessary to maintain life is diffusion. Diffusion is a key factor in moving ions, fuels, and other molecules into and out of the blood. It is one of the most important components in supplying oxygen to the alveoli and removing carbon dioxide. Without diffusion, substances would find it very difficult to pass through membranes and could cause detrimental effects to the human body...
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No single molecule should diffuse in any particular fashion, but should diffuse randomly. This report looks at four simulations attempting to solve the problem presented, how do the molecules know which way to diffuse? In order to understand the obtained research, it is necessary to present and identify the key components of Fick's Law of Diffusion: F = -D * A*dC/dx F = the flow of material across a real or imaginary plane D = the diffusivity of the diffusing molecules (the ease in which the molecule diffuses in the surrounding medium) A= area of the plane C= concentration of the molecules X= distance dC/dx = the concentration gradient There will be four simulations conducted in order to apply Fick's Law and determine if molecules do in fact know which way to diffuse...
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