Topic 9 of 30 in the MU Plovdiv syllabus for Biophysics (Medicine, Year 1). The free AceMed note covers it in 2 sections, about 589 words (5 min of reading), with 29 flashcards.
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Membrane transport 2
Membrane transport 3
Membrane transport 2
Free diffusion of ions - the Nernst-Planck equation, dimensionless potential. Non-free diffusion through a pored membrane.
Non-free diffusion through a pored membrane:
To describe the transport through a pored membrane we use Fick's law, which we simplify with the following restrictions:
All concentrations stay constant with time
There is a linear dependence of concentration on the distance
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