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14Action Potential: change of membrane permeability to Na & K
channel opens = permeability increases
15
K Na=0
(K outflux)
K Na (Na influx) K
Na=0 (K
outflux)
K Na=0
(too much K outflux)
K Na=0
(K outflux)
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Na perNa per K perK per
potential potential differencedifference
K per>Na per
Na per>>K per
K per >>Na per
K per> Na per
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1. Axon Diameter (thicker > faster)
2. Myelin Sheath (faster)
3. Temperature (higher > faster)
1. Axon Diameter (thicker > faster)
2. Myelin Sheath (faster)
3. Temperature (higher > faster)
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Synaptic vesicle
Presynaptic membrane
Postsynaptic membrane
Synaptic cleft
Synaptic knob mitochondria
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1.Ensure impulse to pass in one direction
2.Prevent damage of effectors due to over stimulation
3.Act as junctions for dividing up and merging of neurones
1.Ensure impulse to pass in one direction
2.Prevent damage of effectors due to over stimulation
3.Act as junctions for dividing up and merging of neurones