Nervous system review - ch 6 a-c

Nervous system review - ch 6 a-c - Chapter 6 Neuronal...

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A typical neuron has a dendritic region and an axonal region. The dendritic region is specialized to receive information whereas the axonal region is specialized to deliver information. Communication by neurons is based on changes in the membrane’s permeability to ions. Two types of membrane potentials are of major functional significance: graded potentials and action potentials. Chapter 6 Neuronal Signaling and the Structure of the Nervous System
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The two major divisions in the nervous system are the central nervous system (CNS) and the peripheral nervous system (PNS). Within the PNS, major divisions are the somatic nervous system and the autonomic nervous system, which has two branches: the parasympathetic and the sympathetic branches. Chapter 6 Neuronal Signaling and the Structure of the Nervous System (cont.)
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Dendrites: receive information, typically neurotransmitters, then undergo graded potentials. Axons: undergo action potentials to deliver information, typically neurotransmitters, from the axon terminals.
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Among all types of neurons, myelinated neurons conduct action potentials most rapidly. Oligodendrocytes form myelin on central neuronal axons.
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