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20 Cards in this Set
- Front
- Back
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Removes polarity across a membrane; increases Vm
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Depolarization
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Decreases polarity; decreases Vm
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Hyper-Polarization
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Depolarization is caused by
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Excitatory Post-Synaptic Potential
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Hyper-Polarization is caused by
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Inhibitory Post-Synaptic Potential
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totally "On" or totally "Off"; NAP Output
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Action Potential
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Depolarization at -55Vm starts NAP; initiated at Axon Hillock
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Threshold Voltage
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involves voltage gated sodium channels; Positive feedback
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Hodgkin Cycle
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Sodium channels open; Sodium Influx; Rest of channels continue to open (dominoes)
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NAP Propagation
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Potassium channels open slowly;
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Repolarization
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Stops until K+ resets; NAP still possible
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Relative Refractory Period
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A period of time to wait for next NAP
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Absolute Refractory Period
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Area in between Schwann Cells
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Nodes of Ranvier
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Conduction; NAP Leaps between Nodes
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Saltatory
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Demyelinating disease; muscle weakness; visual disturbances
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Muscle Weakness
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Drugs affect nerves by
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blocking Na+
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Junction between an axon and it's target
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THE Synapse
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Synapses are junctions between ____ (Examples)
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Another nerve; muscle; gland
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Function of Electrical Synapse
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Depolarize + contact... (like Gap junctions)
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Electrical Synapses use
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Nuerotransmitters
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Change metabolism
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Metabotropic
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