Electrical synapses are found typically in cardiac and smooth muscle cells.
Transmission is also faster because sodium can influx faster, through connected cytoplasm, than neurotransmitter can cross the synaptic cleft and bind to receptors.
With electrical synapses, the action potential can travel in either direction (either cell can be presynaptic or postsynaptic). This is impossible in cells with chemical synapses because the signal has to travel from the dendrites to the nerve terminal.
Presynaptic sodium floods through the gap junction, an intercellular connection that allows for molecules and ions to travel between the cytoplasm of the presynaptic and postsynaptic cells.
Sodium influx in the postsynaptic cell generates an action potential, just like the one generated by sodium influx through voltage-gated sodium channels.
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