检验专业英语试题及答案

检验专业英语试题及答案1.Whenperformingamanualwhitebloodcellcountusingahemocytometer,whichof

thefollowingstepsiscrucialtoensureaccurateresults?()A.Fillthechambercompletelywithbloodwithoutformingairbubbles.

B.Mixtheanticoagulatedbloodsamplethoroughlybeforeloading.

C.Countallfourcornersquaresandthecentralsquareonthegrid.

D.Dilutethebloodsample1:100withisotonicsaline.Answer:B2.Apatient'sserumpotassiumlevelisreportedas6.2mmol/L.Whichofthefollowing

pre-analyticalfactorsismostlikelytocausesuchafalselyelevatedresult?()

A.Thebloodsamplewascollectedinasodiumcitratetube.

B.Thesamplesatatroomtemperaturefor4hoursbeforeanalysis.

C.Thepatientwasonalow-potassiumdietpriortotesting.

D.Thetourniquetwasappliedforlessthan1minuteduringcollection.

Answer:B3.Duringaroutineurinalysis,youobserveredbloodcellcastsinthesediment.Thisfindingismostindicativeof:()

A.Glomerulonephritis

B.Urinarytractinfection

C.Renalstonedisease

D.DehydrationAnswer:A4.Atechnicianiscalibratingaspectrophotometerforproteinquantification.Whichwavelengthshouldbesetforthebicinchoninicacid(BCA)assay?()A.340nm

B.450nm

C.562nm

D.630nm

Answer:C5.Wheninterpretingacoagulationprofile,aprolongedactivatedpartialthromboplastintime(aPTT)withanormalprothrombintime(PT)suggestsadeficiencyin:()A.FactorVII

B.FactorVIII

C.FactorX

D.Fibrinogen

Answer:B6.WhichofthefollowingstatementsaboutELISA(Enzyme-LinkedImmunosorbent

Assay)iscorrect?()A.Itrequiresradioactiveisotopesforsignaldetection.B.Thesubstratereactionproducesacolorchangeproportionaltoantigenconcentration.

C.Itcanonlydetectantibodies,notantigens.D.Washstepsareunnecessarybetweenreagentadditions.

Answer:B7.Apatient'sbloodgasanalysisshowspH7.32,PaCO248mmHg,andHCO3-22

mmol/L.Thismetabolicprofileindicates:()A.Metabolicacidosiswithpartialrespiratorycompensation

B.Respiratoryacidosiswithpartialmetaboliccompensation

C.PuremetabolicalkalosisD.PurerespiratoryalkalosisAnswer:A8.Duringadifferentialleukocytecount,youidentifycellswithbilobednucleiandpink/redcytoplasmicgranules.Thesecellsaremostlikely:()A.Neutrophils

B.Eosinophils

C.Basophils

D.Monocytes

Answer:B9.Whichqualitycontrolmeasureisessentialbeforerunningabatchofcholesteroltests

onanautomatedanalyzer?()A.Performablankcalibrationusingdistilledwater.

B.Runthreelevelsofcontrolmaterialswithintheassayrange.

C.Checkthereagentexpirationdateonlyifresultsareabnormal.

D.Calibratetheinstrumentdailyregardlessofusagefrequency.

Answer:B10.Atechniciannoticeslipemiainapatient'sserumsample.Whichofthefollowingtestswillbemostaffectedbythisinterference?()

A.Sodiummeasurement

B.Glucosemeasurement

C.Triglyceridemeasurement

D.Creatininemeasurement

Answer:C11.WhenperformingaGramstain,whichstepdifferentiatesGram-positivefromGram-

negativebacteria?()A.Crystalvioletapplication

B.Iodinemordanttreatment

C.Alcoholdecolorization

D.Safranincounterstaining

Answer:C12.Apatient'shemoglobinA1clevelis8.5%.Thisresultcorrelatesbestwithwhichofthefollowingaveragebloodglucoserangesoverthepast2-3months?()A.70-99mg/dL

B.100-125mg/dL

C.126-180mg/dL

D.>180mg/dL

Answer:D13.Whichofthefollowingistheprimaryfunctionofareferencerangeinclinical

laboratorytesting?()A.TodiagnosespecificdiseasesB.Toestablishnormalvaluesforahealthypopulation

C.Tomonitortherapeuticdruglevels

D.Tocalibratelaboratoryinstruments

Answer:B14.Duringabloodsmearevaluation,youobservetargetcells(codocytes).Thisfindingismostcommonlyassociatedwith:()

A.Irondeficiencyanemia

B.LiverdiseaseC.ThalassemiaD.LeadpoisoningAnswer:B15.AlaboratoryusestheWestergrenmethodtomeasureerythrocytesedimentationrate

(ESR).WhichofthefollowingfactorscanfalselydecreaseESRvalues?()

A.IncreasedfibrinogenlevelsB.MicrocytosisC.Samplecollectionafterprolongedfasting

D.Roomtemperatureabove25°CAnswer:B16.Wheninterpretingathyroidfunctiontest,elevatedTSHwithlowfreeT4suggests:()

A.PrimaryhyperthyroidismB.SecondaryhyperthyroidismC.PrimaryhypothyroidismD.Centralhypothyroidism

Answer:C17.WhichofthefollowingisthecorrectorderofstepsinPCR(PolymeraseChain

Reaction)?()A.Denaturation→Annealing→Extension

B.Extension→Denaturation→Annealing

C.Annealing→Extension→Denaturation

D.Denaturation→Extension→Annealing

Answer:A18.Atechnicianreceivesarequestfora"coldagglutinin"test.Whichofthefollowing

conditionsisthistestprimarilyusedtodiagnose?()A.MycoplasmapneumoniaeinfectionB.IrondeficiencyanemiaC.HemophiliaAD.VonWillebranddiseaseAnswer:A19.Duringachemistryprofile,apatient'salbuminlevelisreportedas2.8g/dL.Whichof

thefollowingpre-analyticalerrorscouldcauseafalselylowresult?()

A.Usingaserumseparatortubeinsteadofaplainred-toptubeB.Delayingcentrifugationfor2hoursaftercollectionC.Runningthetestimmediatelyaftercollectionwithoutchilling

D.OverfillingthecollectiontubeAnswer:B20.Whichofthefollowingstatementsaboutflowcytometryisaccurate?()

A.Itcanonlyanalyzecellsizeandshape.B.Itrequiresfluorescentlylabeledantibodiesforspecificantigendetection.

C.Itisprimarilyusedforquantitativechemicalanalysis.

D.Itcannotdistinguishbetweenliveanddeadcells.

Answer:B21.Apatient'surinedipstickshowspositiveforbilirubinbutnegativeforurobilinogen.Thispatternsuggests:()

A.Hemolyticanemia

B.Obstructivejaundice

C.HepatitisD.Gilbertsyndrome

Answer:B22.Whenperformingaplateletcount,whichofthefollowingartifactscancauseafalselyelevatedresult?()A.ClumpsofplateletsB.RedbloodcellfragmentsC.ExcessiveEDTAinthecollectiontube

D.Lowambienttemperatureduringcounting

Answer:B23.WhichofthefollowingisthemostappropriatespecimenfordetectingHelicobacterpyloriantigens?()

A.SerumB.StoolC.SalivaD.UrineAnswer:B24.Alaboratoryreportsapatient'sD-dimerlevelas3.5μg/mL(referencerange<0.5μg/mL).Thiselevatedresultismostsuggestiveof:()A.DeepveinthrombosisB.IrondeficiencyC.HypothyroidismD.Chronickidneydisease

Answer:A25.Duringabloodculturecollection,whichofthefollowingpracticesreducestheriskof

contamination?()A.Usingalcoholwipesinsteadofiodineforskindisinfection

B.Collectingbloodfromacentralvenouscatheter

C.Disinfectingthevenipuncturesitewithchlorhexidineandallowingittodry

D.Fillingtheculturebottlestothemaximumvolume

Answer:C26.AtechnicianistroubleshootingahematologyanalyzerthatconsistentlyreportslowMCV(meancorpuscularvolume)values.Whichofthefollowingisthemostlikelycause?()A.Incorrectdilutionfactor

B.Cloggedsampleaspirationprobe

C.ExpiredreagentsD.Impropercalibrationofthesizedetector

Answer:D27.Whichofthefollowingstatementsaboutlateralflowassays(e.g.,homepregnancy

tests)istrue?()A.Theyrequirespecializedlaboratoryequipmentforinterpretation.

B.Thecontrollineconfirmspropertestfunctioningregardlessoftheresult.

C.Theycanonlydetectqualitative(yes/no)results.

D.Samplevolumedoesnotaffecttestaccuracy.

Answer:B28.Apatient'sserumcalciumlevelis8.0mg/dL(referencerange8.5-10.2mg/dL).

Whichofthefollowinglaboratoryfindingswouldconfirmhypocalcemia?()

A.ElevatedserumphosphorusB.LowserumalbuminC.NormalionizedcalciumlevelD.ElevatedparathyroidhormoneAnswer:A29.Whenperformingamanualdifferentialcount,youobserve>10%blastsinthe

peripheralblood.Thisfindingismostconsistentwith:()

A.AcutemyeloidleukemiaB.ChroniclymphocyticleukemiaC.IrondeficiencyanemiaD.InfectiousmononucleosisAnswer:A30.Whichofthefollowingistheprimarypurposeofacontrolchartinqualityassurance?()A.Tocalibratelaboratoryinstruments

B.Tomonitorassayprecisionanddetectshiftsovertime

C.Toestablishreferencerangesfornewtests

D.Totrainnewlaboratorypersonnel

Answer:B31.Atechniciannotesthatapatient'scerebrospinalfluid(CSF)isxanthochromic.Thisappearanceismostcommonlydueto:()

A.BacterialmeningitisB.ViralencephalitisC.Subarachnoidhemorrhage

D.MultiplesclerosisAnswer:C32.Duringacoagulationtest,apatient'sPTisprolongedwhileaPTTisnormal.This

patternsuggestsadeficiencyin:()A.FactorVIII

B.FactorVII

C.FactorXII

D.Fibrinogen

Answer:B33.Whichofthefollowingstatementsaboutliquidchromatography-massspectrometry

(LC-MS)iscorrect?()A.Itisprimarilyusedforqualitativeanalysisonly.

B.Itrequiresradioactivetracersfordetection.

C.Itcanseparateandquantifycomplexmixturesofcompounds.

D.Itislesssensitivethantraditionalimmunoassays.

Answer:C34.Apatient'surinesedimentshowsnumerousoxalatecrystals.Thisfindingismostsuggestiveof:()A.Uricacidnephrolithiasis

B.Calciumoxalatestonedisease

C.CystinuriaD.StruvitestonesAnswer:B35.Wheninterpretingaliverfunctiontest,elevatedASTandALTwithnormalalkalinephosphatasesuggests:()

A.Cholestaticliverdisease

B.Hepatocellularinjury

C.Biliaryobstruction

D.Bonemetabolismdisorder

Answer:B36.Whichofthefollowingisthecorrectformulaforcalculatingtheaniongap?()A.(Na++K+)-(Cl-+HCO3-)

B.(Na+)-(Cl-+HCO3-)

C.(K+)-(Cl-+HCO3-)

D.(Na++Cl-)-(K++HCO3-)

Answer:B37.Atechnicianisperformingamanualplateletestimateusingahemocytometer.Which

ofthefollowingcountingareasshouldbeused?()

A.ThecentrallargesquareB.ThefourcornerlargesquaresC.TheRBCcountingareaD.TheWBCcountingarea

Answer:B38.Duringaglucosetolerancetest,apatient'sfastingglucoseis95mg/dL,and2-hourpostprandialglucoseis210mg/dL.Thisresultmeetswhichofthefollowingdiagnosticcriteria?()A.Normalglucosetolerance

B.Impairedfastingglucose

C.Diabetesmellitus

D.Gestationaldiabetes

Answer:C39.Whichofthefollowingisthemostappropriatespecimenfordetectinginfluenzavirusantigens?()

A.SerumB.Nasopharyngealswab

C.StoolD.UrineAnswer:B40.Alaboratoryreportsapatient'stroponinIlevelas0.8ng/mL(referencerange<0.04ng/mL).Thiselevatedresultismostindicativeof:()

A.MyocardialinfarctionB.StableanginaC.Pulmonaryembolism

D.Skeletalmuscleinjury

Answer:A41.WhenperformingaGramstain,over-decolorizationwithalcoholcanleadto:()

A.False-positiveGram-positiveresultsB.False-negativeGram-negativeresultsC.LossofallbacterialstructuresD.EnhancedvisibilityofendosporesAnswer:B42.Apatient'sserumcreatinineis1.4mg/dL(referencerange0.6-1.2mg/dL),buttheirestimatedglomerularfiltrationrate(eGFR)isnormal.Thisdiscrepancyismostlikelydueto:()A.Increasedmusclemass

B.Earlyrenalfailure

C.LaboratoryerrorD.Dehydration

Answer:A43.Whichofthefollowingstatementsaboutpoint-of-caretesting(POCT)isaccurate?()

A.Itrequiresextensivecalibrationbeforeeachuse.

B.Itisprimarilyperformedincentralizedlaboratories.

C.Itprovidesrapidresultsbutmayhavehighervariability.

D.Itcannotbeusedforquantitativemeasurements.

Answer:C44.Atechnicianobserves"rouleauxformation"inabloodsmear.Thisfindingismostcommonlyassociatedwith:()

A.Multiplemyeloma

B.Irondeficiencyanemia

C.ThalassemiaD.Acutebloodloss

Answer:A45.Duringacoagulationassay,atechnicianaccidentallyusesexpiredthrombinreagent.Thiserrorwi