Aktionspotential: Forskelle mellem versioner
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m jeg har tilføjet aktionspotential til wikidata så interwiki links indsættes automatisk |
m Implementerer rettelsesforslag fra Bruger:Mis4930, se evt. Wikipedia:Evaluering/Aktionspotential |
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[[Fil:Action potential vert.png|thumb|upright|'''A.''' Illustration af et ideelt aktionspotential, der viser dets faser, dvs. ændringerne i membranpotentialet i et bestemt punkt på [[cellemembran]]en som funktion af tiden. '''B.''' Målinger af aktionspotentialer er ofte forvrængede i forhold til det ideelle eksempel på grund af målemetoderne.|alt=Two plots of the membrane potential (measured in mV) versus time (ms). Top: idealized plot where the membrane potential starts out at -70 mV at time zero. A stimulus is applied at time = 1 ms, which raises the membrane potential above -55 mV (the threshold potential). After the stimulus is applied, the membrane potential rapidly rises to a peak potential of +40 mV at time = 2 ms. Just as quickly, the potential then drops and overshoots to -90 mV at time = 3 ms, and finally the resting potential of -70 mV is reestablished at time = 5 ms. Bottom: a plot of an experimentally determined action potential that is very similar in appearance to the idealized plot, except that the peak is much sharper and the initial drop is to -50 mV increasing to -30 mV before dropping back to the resting potential of -70 mV.]]
Et '''aktionspotential''' er
== Udløsning af aktionspotentialer ==
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