生理学基本概念双语解释文档格式.docx
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后负荷afterload
Afterloadistheloadthatisgiventothemuscleafterthebeginningofthecontraction.
自身调节autoregulation
Incertaincases,atissueororgancanresponddirectlytotheenvironmentalchanges,dependingneitheronnervousnoronhumoralcontrol.Thisformofregulationiscalledauto-regulation.
完全强直收缩completetetanus
Whenthefrequencyofstimulationreachesacriticallevel,thesuccessivecontractionsaresorapidthattheyliterallyfusedtogether,andthecontractionappears
tobecompletelysmoothandcontinuous.Thisiscalledcompletelytetanus.
去极化depolarization
Thechangeinmembranepotentialawayfromtherestingpotentialandtowardthesodiumequilibrium.
入胞endocytosis
Verylargeparticlesenterthecellbyaspecializedfunctionofthecellmembranecalledendocytosis.Theprincipleformsofendocytosisarepinocytosisandphagocytosis.
平衡电位equilibriumpotential
Electrochemicalequilibriumisasteadystate,asintherestingmembranepotentialofacell,inwhichanelectricalpotentialandchemicalpotentialgradientareinbalanceandnonetmovementofchargedparticlesoccurs.
兴奋性excitability
Excitabilityistheabilityofcertainkindsofcells(excitablecell)togenerateactivechangesintheirmembranepotential.Excitabilityisafundamentalpropertycommontoalltissuesandcells.
兴奋excitation
Excitationsignifiesandincreasesinactivity,suchascontractionofamuscle,accelerationoftheheartbeat.
出胞exocytosis
Astimulustosecretecausestheintracellularvesiclestofusewiththeplasmamembraneandtoreleasethevesiclescontentsiscalledexocytosis.
易化扩散facilitateddiffusion
Infacilitateddiffusion,transportproteins(carrierandchannelproteins)hastenthemovementofcertainsubstancesacrossamembranedowntheirconcentrationgradients.
Channelsaremembraneproteinsthatcontainsmall,highlyselectiveaqueouspores.
Channelsusuallyallowspecificion,eg,Na+,K+,Ca2+orCl-tomovedowntheirelectrochemicalgradientsacrossthemembrane.
反馈feedback
Feedbackisaflowofinformationalongaclosedloop.Usually,aconstancyofphysiologicalvariablerequiresafeedbackmechanismthatfeedstheoutputinformationbacktothecontrolsystemsoastomodifythenatureofcontrol.
稳态Homeostasis
Homeostasisisthemaintenanceofaconstantstatewithspecialreferencetotheinternalmedium.
体内invivo
Experimentsperformedonthewholebody.
内环境internalenvironment
Allcellsofthebodyliveintheextracellularfluid,extracellularfluidiscalledtheinternalenvironmentofthebody.
等长收缩isometriccontraction
Tensionincreasesbutthelengthofthemuscledoesnotchangewhenamusclecontracts.
等张收缩isotoniccontraction
Tensionremainsconstantbutthemuscleshortenswhenamusclecontracts.
负反馈negativefeedback
Aregulatedvariableissensed,informationissenttoacontroller,andactionistakentoopposechangefromthedesirevalue.
神经肌肉接头neuromuscularjunction
Thecomplexstructureresponsibleforsignaltransmissionfromnervetoskeletalmuscle.
正反馈positivefeedback
Withpositivefeedback,avariableissensedandactionistakentoreinforcechangeofthevariable,soitpromotesachangeinonedirection.
前负荷preload
Preloadistheloadthatisgiventothemusclepriortoitscontraction.
相对不应期relativerefractoryperiod
Aperiodfollowstheendoftheabsoluterefractoryperiod,duringwhichitispossibletoelicitasecondactionpotential,butthethresholdstimulusintensityishigherthanusual.
复极化repolarization
Shortlyafterdepolarization,thesodiumchannelsbegintocloseandthepotassiumchannelsopenmorethantheynormallydo.Then,rapiddiffusionofpotassiumionstotheexteriorre-establishesthenormalrestingpotential.Thisiscalledrepolarizationofthemembrane.
静息电位restingpotential
Thedifferenceinelectricalpotentialacrossthemembraneofanundisturbedcell,havingapositivesignontheoutsidesurfaceandanegativesignintheinterior.
跳跃传导salutatoryconduction
Conductionofanerveimpulsedownamyelinatednervefiberbyskippingfromnodetonode.
单纯扩散simplediffusion
Diffusionmeanssimplymovementthroughthemembranecausedbyrandommotionofthemoleculesofthesubstances,movingeitherthroughcellmembraneporesorthroughthelipidmatrixofthemembrane.
钠-钾泵sodium-potassiumpump
Thesodium-potassiumpumpisresponsibleforthecoupledactivetransportofNa乜outofcellsandK乜intocells.Sodium-potassiumpumpisalsoanadenosinetriphosphatase,anenzymethatcatalyzesthehydrolysisofATPtoadenosinediphosphate(ADP).
凝集agglutination
Duringbloodtransfusion,theredbloodcellsaggregatedtogetherinclumpswhichweresufficientlylargetoblockminorbloodvessels.Thisclumpingisknownasagglutination.
血液凝固bloodcoagulation
Thecoagulationsystemconsistsofcofactorsandaseriesofzymogenswhichsequentiallyactivateoneanother,leadingtoformationoffibrinatasiteofvascularinjury.
血型bloodgroup
Bloodgroupsaresystemofgeneticallydeterminedantigenicsubstancesonthemembraneofredbloodcells.
血压bloodpressure
Bloodpressuremeanstheforceexertedbythebloodagainstanyunitareaofthevesselwall.
交叉配血cross-matchtest
Serumfromrecipientistestedagainstthedonor'
scells,andserumfromdonoristestedagainsttherecipient'
scells,thistestiscalledcross-matchingtest.
红细胞沉降率erythrocytesedimentationrate
Whenbloodtowhichananticoagulanthasbeenaddedstandsinanarrowtube,theredcellsgraduallysediment,leavingaclearzoneofplasmaabove.Theerythrocytesedimentationrateismeasuredasthelengthtocolumnofclearplasmaafteronehour.
红细胞生成素erythropoietin
Erythropoietinisahormonesecretedbythekidneyswhichstimulateshemoglobinsynthesisanderythropoiesis.
Inmanycasesfibrinwithinbloodvesselsisrapidlydissolvedtorestorethefluidityoftheblood,andinothersthefibrinbecomeshyalinizedorisremovedbyphagocytesandreplacedbyconnectivetissue.Theprocessofliquefactionoffibrinisknownasfibrinolysis.
血红蛋白hemoglobin
Hemoglobinisachromoproteinfoundintheredbloodcellsandhavingagreataffinityforoxygen.
自动节律性autorhythmicity
Autorhythmicityistheabilitytoinitiateitsownbeat.Manycardiactissuesarefoundtohaveautorhythmicity,forexamplesinoatrialnode,intraventriculartractsandPurkinjecells.Inadditiontothecardiactissue,thesmoothmuscleofthegastrointestinaltracthasalsoautorhythmicity.
容量血管capacitancevessels
Theveinshavewidelumenandcontainagreatervolumeofbloodthananyothersectionofthecirculationdoes,thustheveinsarereferredtoasthecapacitancevessels.
心动周期cardiaccycle
Thecardiaceventsthatoccurfromthebeginningofoneheartbeattothebeginningofthenextarecalledacardiaccycle.Cardiaccycleiscomposedoftwoperiods:
systoleanddiastole.
心指数cardiacindex
Cardiacindexisthecardiacoutputpersquaremeterofbodysurfacearea.
心输出量cardiacoutput
Theproductofthefrequencyofpumping(heartrate)andthestrokevolumeisthecardiacoutput;
itisalsocalledminutevolume.
心力储备cardiacreserve
Theabilityofthehearttoadaptneedoforganismforexpellingalargerquantityof
bloodabovethebasallevel.
心血管中枢cardiovascularcenter
Thecardiovascularcentersareresponsibleforintegrationofsensoryinformationandsubsequentmodificationofefferentautonomicnerveactivitytotheheartandbloodvessels.
中心静脉压centralvenouspressure
Thevenouspressureasmeasuredattherightatrium.
代偿间歇compensatorypause
Thepausebetweentheextrabeatandthenextnormalbeatisslightlylongerthantheusualbeatinterval,whichiscalledcompensatorypause.
舒张压diastolicpressure
Diastolicpressureisthelowestbloodpressureinanarteryduringthediastoleoftheheart.
有效不应期effectiverefractoryperiod
Thedurationfromthebeginningofphase0to-60mVofrepolarizationfailstoproduceactionpotentialtoanystimulus,nomatterhowstrong.ThisdurationiscalledERP.IntheERP,theexcitabilityisalmostzero.
射血分数ejectionfraction
Theproportionoftheend-diastolicvolumethatisejected(i.e.strokevolume/enddiastolicvolume).
心电图electrocardiogram
Thesynchronizeddepolarizationsspreadingthroughtheheartcausecurrentsthatestablishfieldpotential,whosedifferencescanbeamplifiedanddetectedbyelectrodesplacedonthebodysurface.Therecordproducediscalledelectrocardiogram.
交换血管exchangevessel
Thecapillariesaretubesformedbyasinglelayerofendothelialcells,.Theycreateaverylargeareawherethematerialexchangesbetweenbloodandthetissuecellstakeplace.
心音heartsound
Whenthevalvesclose,thevanesofthevalvesandthesurroundingfluidsvibrateundertheinfluenceofthesuddenpressuredifferentialsthatdevelop,givingoffsoundthattravelsinalldirectionsthroughthechest.Thesesoundsarecalledheartsounds.
异常自身调节heterometricautoregulation
Regulationofcardiacoutputasaresulto