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092909 - September29,2009 NEURALCONTROL:CHAPTER5 Structure...

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September 29, 2009 NEURAL CONTROL: CHAPTER 5 Structure Function Know pieces and how they work NEURON Neuron:   Individual   nerve   cell -   Dendrites:   receive   messages   from   other   neurons -   Soma:   cell   body;   body   of   the   neuron -   Axon:   carries   information   away   from   the   cell   body - Axon Terminals: Branches that link the dendrites and soma of other neurons - Myelin Sheath: insulates and speed conduction A SIMPLE GUIDE TO HOW A NEURON WORKS Neurons   are   electrically   charged -resting   potential   (-70   millivolts) -more   negatively   charged   particles   exist   inside   the   cell   than   outside - creates electrical charge across membrane
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Action   Potential   or   Nerve   Impulse -   All   or   none     fire   or   don’t   fie -   occur   at   intersection   of   cell   body   and   axon   in   motor   neurons -   in   sensory   neurons     triggered   at   dendritic   ends - the number of impulses influence effect on other neurons
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