The synapse is a structure that permits a neuron to pass an electrical or chemical signal to another cell (neural or otherwise).
Synapses are important to neuronal function. At a synapse, the plasma membrane of the signal-passing neuron
comes into close apposition with the membrane of the target cell.

There are four main functions that a synapse has. They transmit information between neurons,
and filter out low frequency impulses. Also, they act as valves to ensure that impulses pass across them in one direction only,
and they act as junctions allowing impulses to be divided up along many neurons or merge into one.


View Synapse and over 3,000,000 other topics on Qwiki.