Recent content by af86

Hi again, So I have managed to figure out the internal concentrations of each external concentration. Do I then take the average? Or do I just choose a set external concentration (e.g. 100mM) for all ions? Also, from here, how can I calculate PK, PNa and PCl? Which will then allow me to...

So I thought I figured this out - but I haven't! I have some values, as a test, and I can't seem to get it right. Can anybody please help!? I know it uses the equations above, but something is going wrong in the last step when I'm trying to calculate the number of channels and...

Denverdoc, Sorry it's taken me so long to reply - unfortunately I do not have MATLAB and don't know how to use it, any other suggestions - I don't mind if its time consuming to calculate it...a nice easy procedure would be great - I'm still really stuck on this. Thanks

I haven't...that's another part of the question I'm stuck on

I can control external concentration of Na, Cl and K. Which then produces/outputs a membrane voltage.

Homework Statement Have to determine permeabilities \alpha and \beta (PNa/PK and PCl/PK) as well as internal concentrations of Na+, K+ and Cl- I have calculated different membrane voltages according to the external concentration (when altering one ion, the other two were set to zero)...

Thanks denverdoc. I figured it out (I think). But yes, leak conductance was taken into account; I think the only way to go is to divide Gm/G1. Cheers

Yep. Tried that and my answer came out a few order of magnitudes out...double and triple checked all my work and still..could be that the answer given is incorrect. Thanks!

Homework Statement Calculate number of channels present in a lipid bilayer q = 1.6^-19; D (diffusion constant) = 1.2E-9; C (Concentration); 4.36; k = 1.38E-23; T=298; d = 2.5E-9 Therefore G1 = 1.27E-17 Channel area = 7.07E-18 measured conductance (from injecting Na+...

Homework Statement Using a simulation program I must determine cable length (lambda), area specific conductance (Gm) and internal resistivity of a cell. The program allows you to inject a current (in uA) and change the electrode distance from the centre of the cell. The simulator...