免疫相关英语测试题及答案

免疫相关英语测试题及答案考试时间：______分钟总分：______分姓名：______一、Choosethebestanswer.1.WhichofthefollowingcellsisprimarilyresponsibleforinitiatingadaptiveimmuneresponsesbypresentingantigenstoTcells?a)Blymphocyteb)Macrophagec)HelperTcell(CD4+Tcell)d)CytotoxicTcell(CD8+Tcell)2.Thebindingofanantibodytoitsspecificantigenisprimarilymediatedby:a)Complementactivationb)Antibody-dependentcell-mediatedcytotoxicity(ADCC)c)Theconstantregionoftheantibodyd)Thevariableregionoftheantibody3.WhichtypeofimmuneresponseischaracterizedbytheproductionofantibodiesprimarilymediatedbyBcells?a)Cell-mediatedimmunityb)Humoralimmunityc)Passiveimmunityd)Innateimmunity4.MajorHistocompatibilityComplex(MHC)moleculesarecrucialfor:a)TransportingantigenstothesurfaceofBcellsb)Mediatingthebindingofantibodiestoantigensc)PresentingpeptideantigenstoTcellsforrecognitiond)Activatingcomplementdirectly5.WhichofthefollowingisakeyfunctionofCD4+Thelpercellsintheimmuneresponse?a)Directlykillinginfectedhostcellsb)Producingantibodiesc)Phagocytosingpathogensd)AssistingBcellsandmacrophagesinantigenprocessingandpresenting6.Interleukinsareagroupof:a)Antibodiesb)Antigensc)Cytokinesd)Complementproteins7.TheprocessbywhichBcellsbecomesensitivetoanantigenonlyafterbeingexposedtoitiscalled:a)Passiveimmunityb)Innateimmunityc)Toleranced)Sensitization8.WhichofthefollowingisNOTacharacteristicofinnateimmunity?a)Rapidresponseb)Specificityc)Memoryd)Non-specificity9.MacrophagesphagocytosepathogensandpresentantigenstoTcellsthrough:a)Bcellreceptors(BCRs)b)MajorHistocompatibilityComplex(MHC)classImoleculesc)MajorHistocompatibilityComplex(MHC)classIImoleculesd)Fcreceptors10.CytotoxicTlymphocytes(CTLs)recognizeandkillinfectedcellsprimarilyby:a)Producingantibodiesb)Releasingperforinandgranzymesc)Phagocytosingthetargetcelld)Activatingthecomplementpathway二、Markallthecorrectanswers.1.Whichofthefollowingcellsarepartoftheinnateimmunesystem?a)HelperTcellsb)Macrophagesc)CytotoxicTcellsd)NaturalKiller(NK)cells2.Antibodiescanmediatewhichofthefollowingimmunefunctions?a)Neutralizationoftoxinsb)Opsonizationofpathogensc)Activationofthecomplementsystemd)Directkillingofinfectedcells3.Theadaptiveimmuneresponseischaracterizedby:a)Non-specificityb)Rapidresponseuponfirstexposurec)Memoryd)Involvementofphagocytesasprimaryresponders4.Componentsofthecomplementsysteminclude:a)Antibodiesb)C3andC5proteinsc)MHCmoleculesd)FactorB5.Functionsofcytokinesintheimmunesysteminclude:a)Recruitingimmunecellstothesiteofinfectionb)Activatingimmunecellsc)Regulatingimmuneresponsesd)Producingantibodies三、Fillintheblankswithoneappropriatewordfromthelistbelow.|ListofWords:|antigen|lymphocyte|cytokine|opsonization|MHC|phagocytosis||:|:|:--|:-|:--|:-|:--||1.Thesubstancethattriggersanimmuneresponse.||||||||2.Atypeofwhitebloodcellinvolvedinimmunity.||||||||3.Asignalingmoleculethatregulatesimmuneresponses.||||||||4.Theprocessbywhichpathogensareengulfedbyphagocytes.||||||||5.MoleculesoncellsurfacesthatpresentantigenstoTcells.|||||||四、TranslatethefollowingsentencesintoEnglish.1.体液免疫主要通过抗体来清除细胞外病原体。2.T细胞受体(TCR)能够特异性识别MHC分子呈递的抗原肽。3.树突状细胞是连接先天免疫和适应性免疫的重要桥梁。4.细胞因子在调节免疫应答和炎症反应中发挥着关键作用。5.获得性免疫具有特异性和记忆性。试卷答案一、Choosethebestanswer.1.c)HelperTcell(CD4+Tcell)**解析思路：*HelperTcells(CD4+)recognizeantigenspresentedbyMHCclassIImoleculesonantigen-presentingcells(APCs)likemacrophagesanddendriticcells.Thisinteractioniscrucialforinitiatingandcoordinatingbothhumoralandcell-mediatedimmuneresponses.Macrophages(b)phagocytosebutpresentviaMHCclassII.Bcells(a)presentantigensviaMHCclassIIafterinternalization.CytotoxicTcells(d)presentantigensviaMHCclassI.2.d)Thevariableregionoftheantibody**解析思路：*Thevariableregions(Fabfragments)ofanantibodypossessauniquethree-dimensionalstructurethatdirectlybindstoaspecificantigenicdeterminant(epitope)inanantigen-antibodyinteraction.Thisbindingishighlyspecificanddeterminestheantibody'sspecificity.3.b)Humoralimmunity**解析思路：*HumoralimmunityisprimarilymediatedbyBlymphocytes(Bcells)which,uponactivation,differentiateintoplasmacellsthatsecretelargeamountsofantibodiesintothebloodstream.Thisantibody-mediatedresponseiseffectiveagainstextracellularpathogens.4.c)PresentingpeptideantigenstoTcellsforrecognition**解析思路：*MHCmoleculesareessentialfortheimmunesystemtopresentpeptidefragmentsderivedfromantigens(eitherfrominsidethecellviaMHCclassIorfromextracellularsourcesviaMHCclassII)toTcellsfortheirrecognition.Thisisfundamentalfortheadaptiveimmuneresponse.5.d)AssistingBcellsandmacrophagesinantigenprocessingandpresenting**解析思路：*CD4+ThelpercellsrecognizeantigenspresentedbyMHCclassIIonAPCsand,uponactivation,releasecytokinesthathelpBcellsmature,produceantibodies,andmacrophagesenhancetheirphagocyticactivityandantigenpresentation.6.c)Cytokines**解析思路：*Interleukinsareamajorfamilyofcytokines,whicharesignalingmoleculessecretedbyvariousimmunecellsthatregulateimmuneandinflammatoryresponses,includingcellcommunication,differentiation,andactivation.7.d)Sensitization**解析思路：*Sensitizationreferstotheprocessbywhichtheimmunesystembecomesresponsive(sensitive)toaspecificantigenuponitsinitialencounter.Thisleadstothedevelopmentofspecificimmunity.Tolerance(c)istheunresponsivenesstoself-antigensorspecificforeignantigens.Innateimmunity(b)isnon-specificandpresentfrombirth.Passiveimmunity(a)involvesacquiringpre-formedantibodies.8.b)Specificity**解析思路：*Innateimmunityischaracterizedbyrapid,non-specificresponsestoawiderangeofpathogens.Specificity(b)isahallmarkoftheadaptiveimmunesystem,whichtargetsspecificantigensandremembersthemforfasterresponsesuponre-exposure.9.c)MajorHistocompatibilityComplex(MHC)classIImolecules**解析思路：*Professionalantigen-presentingcells(APCs)likemacrophagesinternalizepathogens,processtheantigensintopeptides,andpresentthesepeptidesontheirsurfaceviaMHCclassIImolecules.ThispresentationisrecognizedbyCD4+Thelpercells.10.b)Releasingperforinandgranzymes**解析思路：*CytotoxicTlymphocytes(CTLs),uponrecognizinganinfectedcellviaitsMHCclassI-presentedantigen,releaseperforintocreateporesinthetargetcellmembraneandgranzymes,whichenterthecellthroughtheseporesandinduceapoptosis(programmedcelldeath)oftheinfectedcell.二、Markallthecorrectanswers.1.b)Macrophages,d)NaturalKiller(NK)cells**解析思路：*Macrophagesarephagocyticcellsoftheinnatesysteminvolvedinpathogenclearanceandantigenpresentation.NaturalKiller(NK)cellsarelymphocytesoftheinnatesystemthatcankillinfectedortumorcellswithoutpriorsensitization.HelperTcells(a)andCytotoxicTcells(c)arepartoftheadaptiveimmunesystem.2.a)Neutralizationoftoxins,b)Opsonizationofpathogens,c)Activationofthecomplementsystem**解析思路：*Antibodiescanneutralizetoxinsbybindingtothem,preventingthemfromharminghostcells.Theycancoatpathogens(opsonization)markingthemfordestructionbyphagocytesorNKcells.Bindingofantibodiestopathogensurfacescanactivatethecomplementcascade,leadingtopathogenlysisorrecruitmentofinflammatorycells.Antibodiesdonotdirectlykillinfectedcells(d).3.b)Rapidresponseuponfirstexposure,c)Memory**解析思路：*Theadaptiveimmunesystemischaracterizedbyitsspecificity(targetingspecificantigens)andmemory(fasterandstrongerresponseuponre-exposuretothesameantigen).Theresponseuponfirstexposure(primaryresponse)isgenerallyslowercomparedtothesecondaryresponse.Theprimaryrespondersininnateimmunityareoftenphagocytes(bisincorrectforinnate).Non-specificity(a)ischaracteristicofinnateimmunity.4.a)Antibodies,b)C3andC5proteins,d)FactorB**解析思路：*Thecomplementsystemconsistsofacascadeofproteins,manyofwhichareplasmaproteinslikeC3,C5,andFactorB.Antibodies(a)canbindC1qandinitiatetheclassicalpathway.C3andC5arekeycomponentsinvolvedintheformationoftheMembraneAttackComplex(MAC)andamplificationsteps.FactorBisinvolvedinthealternativepathway.5.a)Recruitingimmunecellstothesiteofinfection,b)Activatingimmunecells,c)Regulatingimmuneresponses**解析思路：*Cytokinesarediversesignalingmoleculesthatperformvariousfunctionsintheimmunesystem,includingchemokineactivity(recruitingcells,a),mediatingtheactivationofcellslikeTcellsandmacrophages(b),andregulatingthebalancebetweendifferentimmuneresponses(c).Theyarenotprimarilyinvolvedinproducingantibodies(d),whichistheroleofBcells.三、Fillintheblankswithoneappropriatewordfromthelistbelow.1.antigen**解析思路：*Anantigenisanysubstancethatcanberecognizedbytheimmunesystemandcantriggeranimmuneresponse,leadingtotheproductionofantibodiesoractivationofTcells.2.lymphocyte**解析思路：*Lymphocytesareatypeofwhitebloodcellthatcon