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Cards In This Set
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Axon
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Wrapped in the myelin sheath, they extend from the soma and send action potentials
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Synapse
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The space between the terminal button of one neuron and the dendrite of another, this is where NTs will be released
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Post synaptic neuron
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The neuron whose dendrite is receiving the NTs from the synapse
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Presynaptic neuron
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The neuron from which the NT is being released from the terminal button
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Neurotransmitters
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Made in the neuron, stored in vesicle and released into the synapse following an action potential, can elicit either an inhibitory or an excitatory response
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Classes of NT
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Ach, Amino Acids, Biogenic Amines, Neuropeptides
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Neuronal Membrane
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The lipid bilayer surrounding the neuron
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Resting Membrane Potential
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The difference in voltage between the inside and outside of the cell, this is about -70 mV
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Ion channel
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Integral membrane proteins which allow ions to pass between the inside and outside of the cell, control ion permeability and maintain RMP
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Na/K Pump
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Establishes ion concentrations by pumping in 2 K ions and out 3 Na for a result of negative 1 every pump
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Electrotonic Conduction
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Passive electrical conductions, flow about 1 mm and decrease in strength over distance
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Action Potential
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Active electrical conduction, rapid depolarization and repolarization of the membrane in a local area, these are all or none, regenerative and active.
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Threshold
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The mV value a membrane must be depolarized to in order to fire an action potential
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Depolarization
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Occurs as the mV in the membrane becomes more positive
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Refractory Period
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Time following an AP where it is harder to fire another AP because the cell is temporarily more negative due to voltage gated K channels remaining open
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