Electrical Charge and Attraction

In the solution that bathes our neuron, most of the floating atoms and molecules are charged. That makes these particles ions. Now charges interact with each other. The animation below illustrates the interaction of opposite charges (one positive and one negative). 
Figure 4. When two opposite charges are near each other they will be drawn towards each other. That is, as far as ions are concerned, opposites attract. That is the principle that drives electricity through electrical lines. An example would be a circuit with a battery.  The lines ultimately connect at the two poles of the battery: one labeled positive and one labeled negative. 
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