From Neurone to Brain 3

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  • Created by: jessica
  • Created on: 01-10-13 07:59

Excitable cells generate action potentials. An unstimulated excitable cells is at a resting potential (Vm) which is due to the difference in ion concentrations on the inside and outside of the cell.

Nerve cells have a K+ equilibrium potential around -90mV.

Equilibrium potentials can be calculated using the 'Nernst equation' which is E = (RT/zF)LnCe/Ci

Leak channels are protein ion channels that cause the permeability of cell membranes to ions.

Neurons fire action potentials when they have been depolarized above the threshold level.

Action potentials…

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