Unformatted text preview: current of potassium leaving the cell is equal. There is an ohmic relationship with the cell, as the amplitude varies linearly with the voltage or potential of the membrane. With an action potential what happens is the permeability ratio is simply altered and that changes membrane potential! However, no matter what the membrane potential will never be equal to an ion’s equilibrium potential or the potential that the ion would be in equilibrium if it were the only permeant ion. Answers to in class questions a) depolarize b) hyperpolarize Gates When the gates are closed there is a low possibility/probability to find these gates open. During depolarization the permeability to sodium increases and b=20 which is 1,000 fold During repolarization the permeability to potassium increases The m-gate is known as the fast sodium channel and is one of the fastest biological actions known....
View Full Document
This note was uploaded on 05/18/2008 for the course BIO 317 taught by Professor Simonhalegoua during the Fall '08 term at SUNY Stony Brook.
- Fall '08
- Cell Signaling