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Moreover, the distinctions based on function between neurons and other cells such as cardiac and muscle cells are not helpful.Thus, the fundamental difference between a neuron and a nonneuronal cell is a matter of degree.Once bounded with Ca2 , the vesicles dock and fuse with the presynaptic membrane, and release neurotransmitters into the synaptic cleft by a process known as exocytosis.The neurotransmitters then diffuse across the synaptic cleft and bind to postsynaptic receptors embedded on the postsynaptic membrane of another neuron.Several techniques such as intracellular recording, patch-clamp, and voltage-clamp technique, pharmacology, confocal imaging, molecular biology, two photon laser scanning microscopy and Ca2 imaging have been used to study activity at the cellular level.Cellular neuroscience examines the various types of neurons, the functions of different neurons, the influence of neurons upon each other, how neurons work together.

Briefly, the model states that the generation of an action potential is determined by two ions: Na and K .Some neurons such as photoreceptor cells, for example, do not have myelinated axons that conduct action potentials.Other unipolar neurons found in invertebrates do not even have distinguishing processes such as dendrites.After neurotransmitters are synthesized, they are packaged and stored in vesicles.These vesicles are pooled together in terminal boutons of the presynaptic neuron.

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