Examine Figure 2:
Figure 2. Now that the gates have been opened, the random movements of the molecules have caused, overtime, the number of molecules to be equal on the two sides of the barrier. Notice how at the end of the animations three repetitions the same number of molecules are on each half of the beaker. This equality is dynamic as molecules are constantly crossing the barrier at all times.

 Try to apply the idea of diffusion to the action of ions in the axon.
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