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Systems Phys - CH5

Balliet fall 2010

QuestionAnswer
which ions are higher OUTSIDE the cell? K, Mg, H, PO3-, sulfate, Protein
Which ions are higher OUTSIDE Na, Ca2+, HCO3-, Cl-
What is the charge when the membrane is only permeable to POTASSIUM? -94mV
What is the charge when the membrane is only permeable to SODIUM? +61mV
Electrical potential that counters net diffusion of Na/K is called? Na/K equilibrium potential
Why is the Vm so close to Ek? Membrane is more permeable to K than Na
Na/K Nernst Potential Ek = -61 log (Nai/Nao) or -61 log (Ki/Ko) [if a (-) ion (ex Cl) then chg (-) to (=)]
Created by: mrw2013