intracellular space extracellular space membrane R m R m R m R m R m R m R m R m R m R m R m R i R o R i R o R i R o R i R o R i R i R o R i R o R i R o R i R o R i R o R o

Figure 1.1 Model Membrane. Rm represents the resistance of the membrane channels; Ri represents the resistance of the axon’s cytoplasm; Ro represents the resistance of the extracellular fluid.

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