Fick's law -- how insects are adapted for gas exchange
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Rate of diffusion=surface area X differecnce in concentration / length of diffusion pathway
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Fick's Law
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<br>Q = D A (C1-C2)/L
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<br>Q, rate of diffusion of substance between two locations
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<br>D, Diffusion coefficient of the substance in a given medium
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<br>A, cross sectional area over which diffusion is occurring (surface area)
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<br>C1, C2, concentrations of the substance in the two locations
<br>L, distance between the two locations
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<br>Thus (C1-C2)/L = Concentration gradient.
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<br>Evolutionary changes optimize Q by favouring certain ...
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