PSYC326_3 - PSYC 326 NOTE Chapter 2 Structure and Functions...

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PSYC 326 - NOTE Chapter 2. Structure and Functions of Cells of the Nervous System BOX Kathryn D. with myasthenia gravis [identified later in the chapter; probably injected with AChE antagonist physiostigmine] THEME movement (behavior) is the primary function of the nervous system sensory neurons interneurons local interneurons relay interneurons motor neurons estimates of neurons in human nervous system range from 100 billiion to 1000 billion central nervous system CNS peripheral nervous system PNS Cells of the Nervous System Neurons Basic Structure functions of the neuron (i) information-processing (ii) information-transmitting Soma soma cell body Dendrites dendrites receive messages synapses Axon axon myelin sheath action potential same size and duration branches also have same size and duration neuron types multipolar neurons bipolar neurons unipolar neurons Terminal Buttons terminal buttons aka bouton , terminals neurotransmitter excites or inhibits Internal Structure membrane
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