All or none principle An fill potential takes empower in 2 phases: depolarization: within the tissue layer becomes + Repolarization : inside becomes much(prenominal) Na+ and k+ are ions that survive through the tissue layer via ion channels and tack the electric charge of the neuron - when NA+ channels open, NA+ moves inside= depolarization - When K+ channels open, K+ moves out + repolarization - When depolarization reaches theresheeled (-55mv), it produces an action potential that is of all clock the same size= all or none Depolarization phase NA+ moves in- inside the membrane goes from -55mv to 30 mv Repolarization phase IC+ moves out- inside the membrane goes from 30mV to -70 mV Can have an after(prenominal) hyperlarization phase= inside becomes more negative than -70mV, but it regulates rear to -70mV Refactory design Absolute refractory: game action potential crowd out not be initiated social intercourse Refractory: second action potential can be initiated, but only by a lager than linguistic rule stimulus 13 all or none action potential questions 1 GP creates electrical and signal rarely in size 2 when depolarization reaches no 3 NA+ + IC+ NA+ K+ 4 AP go forth not regenerated 5 full stop of time after ab begins, during which an exestable cell can not generate during absolute , second AP cannot be initiated and during relative, second AP can be initiated but only 6 gravid diameter axons 14 mess up conduction synapse and repair 1 because it opens to deplolarization and an excitatory gradesynaptic potential 2 slow complicate; in involves simultaneous release 3 because of neurotransmitter from several presynaptic axon terminals 4 by occurring...If you want to larn a full essay, post it on our website: Orderessay
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