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22 Cards in this Set
- Front
- Back
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"undershoot" (hyperpolarization) The K+ gates are
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sluggish
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What kind of response is their to depolirization
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slow
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What is he propagation of AP?
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AP must be propagated along axons entire length away from pint of origin
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All or None Phenomenon
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Happens completely or not at all.
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If too fe Na ions enter to achieve thershold what happens
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nothing
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What is the absolute refactory period?
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*period of opening of activation gates to closing of inactivation gates
*Ensures tht ea. AP is a seperate |
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What is the relative refactory period?
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interval following absolute refactory period
repolarization occuring |
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When conducting velocities factors the axon diameter is
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the larger the diameter the faster it conduct impulse
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The myelin sheath has continuous conductiin of
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unmyelinated axons
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Salatory conduction is
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and electrical signal which jumps from mode to mode
myelin acts as and insulation |
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The unique junction mediates info that...
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transfers from one neuron to the next or a neuron to and effector
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The presynaptic is
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the infor center, it conducts impulses toward the synopose
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Polysynaptic neuron
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Is the infor reciever it transmits electrical signals away from the synapse
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Neuronal Pools are
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Functional groups of neurons, and they integrate incoming info then forward the info to other destinations
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What are the 4 types of circuits
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Diverging, Convering, reverberating, parallel after discharge
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Divering
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One incomung fiber triggers response in increasing #'s of neurons farther and farther dwn the circuit
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Covering
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Pool recieves unputs from many presynoptic neuorons, the incoming circuit may conver from 1 or many diff areas
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reverberating
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incoming sig travels through chain of neurons, positive feed bck sent through again and again
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Parallel
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Incoming filter stimulates several neurons arranged in parallel, there is no positive feedbck
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What r the 2 patterns of neural pocessing
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serial and paraelle
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Serial
Reflexes: |
Rapid automatic response to stimuli
reflex arc has 5 components |
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Parallel
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Inputs segregated into many diff pathways
important for higher lvl mental functioning |
