Recall 1

[Anonymous]

these r exam recalls so no answers provided. but if we try to solve 'em together, it can be a great learning tool. please provide references whenever possible.

[stateofequilibrium]

I would say the concentration gradient, but I believe it's more the membrane potential that's the real cause for allowing an influx of sodium. Though the pump is just as important in restabilizing, and I'm guessing you mean transmembrane proteins?

[Anonymous]

Transmembrane potential diffusion for each ion. Which means, that depends on the electrochemical gradient acrross the membrane. This gradient is the reason why a membrane is excitable.

[Anonymous]

agree

[stateofequilibrium]

Transmembrane potential diffusion for each ion. Which means, that depends on the electrochemical gradient acrross the membrane. This gradient is the reason why a membrane is excitable.

Well.. now that I know what the last two words are, hahaha. The relative concentration though does detemerine the rate of transfusion across the membrane which creates the charge and resting potential.

Kind of like when you you're aldosterone deficient (hyperkalema.. sp?) and have an increase in potassium concentration. It lowers the threshold needed due to concentration differences.

Blah.