Significance of the Synapse and Dual Modes of Synapses

The synapse is a region of specialized contact between neurons or between a neuron and a muscle cell for cell-to-cell communication. The estimated number of synapses in the human nervous system is 1014 (100 trillion), and in light of newly appreciated synaptic diversity it may be even higher. Two modes of synapses have been identified: electrical and chemical. The first has been touched on in the discussion of gap junctions and the neuron doctrine. The second is by far the more common.

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