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绝对不应期absoluterefractoryperiodThetimeintervalduringwhichacellisincapableofinitiatingasecondactionpotential.动作电位actionpotentialAnactionpotentialisarapidchangeinthemembranepotential.Eachactionpotentialbeginswithasuddenchangefromthenormalrestingnegativepotentialtoapositivemembranepotentialdepolarizationandthenendswithanalmostequallyrapidchangebacktothenegativepotentialrepolarization.主动转运activetransportThemovementofsubstancesacrossthemembraneoccursagainsttheelectrochemicalgradientwiththenecessityofconsumptionofmetabolicenergy后负荷afterloadAfterloadistheloadthatisgiventothemuscleafterthebeginningofthecontraction.自身调节autoregulationIncertaincasesatissueororgancanresponddirectlytotheenvironmentalchangesdependingneitheronnervousnoronhumoralcontrol.Thisformofregulationiscalledauto-regulation.完全强直收缩completetetanusWhenthefrequencyofstimulati...。