I Synapse 1. Chemical synapse( Classical Synapse) Predominates in the vertebrate nervous system 2. Non-synaptic chemical transmission 3. Electrical synapse Via specialized gap junctions Does occur but rare in vertebrate Ns Astrocytes can communicate via gap junctionsI Synapse 1.Chemical synapse (Classical Synapse) – Predominates in the vertebrate nervous system 2.Non-synaptic chemical transmission 3.Electrical synapse – Via specialized gap junctions – Does occur, but rare in vertebrate NS – Astrocytes can communicate via gap junctions