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Study Guide

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
show Small, brief, local changes in membrane potential that act as short distance signals. The current produced dissipates w/ distance  
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show brain and spinal cord  
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____ is a disease that gradually destroys the myelin sheths of neurons in the CNS, particularly in young adults   show
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show cranial and spinal nerves  
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show One neuron stmulates the next in sequence, producing specific, predictable responses, as in spinal reflexes.  
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Neurons may be classified according to several characteristics. What are the different groups and what is characteristic of each?   show
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action potential   show
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Depolarization   show
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show period following stimulation during which no additional action potential can be evoked  
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show follows the absolute refractory period, intercal when a threshold for action potential stimulation is markedly elevated.  
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show movement of the membrane potential to the initial resting (polarized) state.  
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norepinephrine   show
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What are special characteristics of neurons?   show
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Ependymal celss function to   show
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An impulse from one nerve cell is communicated to another nerbe cell via the   show
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show neurilemma  
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the part of a neuron that conducts impulses away from its cell body is called an   show
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Collections of nerve cell bodies outside the CNS are called   show
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show association neuron  
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receptive region   show
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trigger zone   show
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show a circular circuit that returns a signal to its source  
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converging circuit   show
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show signs from one neuron sent out to many others  
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Substance P   show
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show the refractory period  
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show lower  
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That part of the nervous system that is voluntary and conducts impulses from the CNS to the skeletal muscles in the ______nervous system   show
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show node of Ranvier  
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The synapse more common in embryonic nervous tissue than in adults is the   show
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When one or more presynaptic neurons fire in rapid order it produces a much greater depolarization of the postsynaptic membrane than would result from a single EPSP; this event is call   show
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define neurotransmitter   show
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What symptoms would a nurse focus on in his or her care of a patient with multiple sclerosis?   show
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