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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.Neurons are cells that are specialized to receive, propagate, and transmit electrochemical impulses.In the human brain alone, there are over eighty billion neurons.As Na ions enter the cell, the membrane potential is further depolarized, and more voltage-gated sodium channels are activated.

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These vesicles are pooled together in terminal boutons of the presynaptic neuron.Oto pena zawarto poradnika: Autor : Jacek Stranger Haas Poradnik zawiera : strony: 121, ilustracje: 1114 .Ostatnia aktualizacja : 15 wrzenia 2016, odwied Opis przejcia Ostatnia aktualizacja : 15 wrzenia 2016, odwied Atlas wiata Skorzystaj z funkcji komentarzy do wskazania bdw lub uzupenienia poradnika.Neurons are diverse with respect to morphology and function.Thus, not all neurons correspond to the stereotypical motor neuron with dendrites and myelinated axons that conduct action potentials.

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