After dealing with the secretory aspect of paraneurons, it is now appropriate to shed light on the corresponding features of neurons. The electric conductivity of neurons has been investigated so extensively that many researchers tend to conceive it as the indispensable activity of neurons. It is, however, becoming more and more evident that the Na+ spike commonly studied by electrophysiologists is generated only by a part of various functions of neurons (see p. 3). On the other hand, it is safe to say that essentially every neuron is secretory in nature. As the secretory nature of neurons is manifested in their possession of messenger-containing granules and vesicles, this chapter will commence with an introduction to the difference in their secretory granules.
KeywordsSynaptic Vesicle Nerve Terminal Secretory Granule Adrenergic Nerve Neurosecretory Neuron
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