Propagation
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| What is AP Propagation? | transfer along an Axon
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| What is Saltatory Propagation? | repeated REGENERATION of AP's at each Node along an Axon
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| What is the significance of Saltatory Propagation? | FASTER propagation velocity (skips though Axon), uses LESS ATP (Na+/K+ pump)
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| What are the steps of Saltatory Propagation? | Stimulation --> Na+ gates OPEN --> Na+ INFLUX --> Depolarization --> + Ions flow away from activated area to next Node
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| What is meant by Decremental? | 50% DECLINE in Amplitude in Saltatory Propagation
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| What is the definition for Refractory Period? | time of membrane Depolarization and Hyperpolarization
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| What is the significance of the Refractory Period? | 1. period of INSENSITIVITY to Stimuli; 2. limits maximum AP Frequency; 3. assures UNIDIRECTIONAL AP Propagation
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| What would be the result of not have Nodes? | NO Nodes --> AP needs to open Na+ ans K+ channels themselves --> uses ATP and takes a lot of TIME
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| What would happen if the nodes were further than 1mm apart? | current may be Subthreshold
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Created by:
Kristel
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