药理学英文题库

药理学英文题库

MultipleChoiceQuestions(SingleAnswer)

1.Whichofthefollowingprocessesreferstothereductionindrugconcentrationasitpassesthroughtheliverbeforeenteringsystemiccirculationafteroraladministration?

A)Biotransformation

B)First-passeffect

C)Enterohepaticcirculation

D)Renalexcretion

2.Theprimarysiteofdrugmetabolisminthehumanbodyis:

A)Kidney

B)Liver

C)Lung

D)Gastrointestinaltract

3.Adrugwithahighvolumeofdistribution(Vd)ismostlikelyto:

A)Stayprimarilyintheplasma

B)Accumulateinadiposetissue

C)Beexcretedrapidlybythekidneys

D)Bindtightlytoplasmaproteins

4.Whichofthefollowingisacompetitiveantagonistattheacetylcholinereceptor?

A)Atropine

B)Neostigmine

C)Pilocarpine

D)Succinylcholine

5.Thetherapeuticindex(TI)ofadrugiscalculatedas:

A)LD50/ED50

B)ED50/LD50

C)LD1/ED99

D)ED99/LD1

6.Whichenzymeisresponsibleforthemetabolismofmostβ-lactamantibiotics?

A)CytochromeP450

B)Acetylcholinesterase

C)β-lactamase

D)Monoamineoxidase

7.Themechanismofactionofaspirin(acetylsalicylicacid)involves:

A)Inhibitionofcyclooxygenase(COX)

B)Activationofopioidreceptors

C)Blockadeofvoltage-gatedsodiumchannels

D)EnhancementofGABAergictransmission

8.Whichofthefollowingdrugsisanon-depolarizingneuromuscularblocker?

A)Succinylcholine

B)Vecuronium

C)Baclofen

D)Diazepam

9.Themainreasonforcombiningclavulanicacidwithamoxicillinisto:

A)Enhanceabsorption

B)Inhibitβ-lactamase

C)Reducerenalexcretion

D)Increaseplasmaproteinbinding

10.Apatientwithheartfailureisprescribeddigoxin.Theprimarymechanismofactionofdigoxinis:

A)InhibitionofNa⁺/K⁺-ATPase

B)Blockadeofβ1-adrenergicreceptors

C)Activationofguanylatecyclase

D)Inhibitionofangiotensin-convertingenzyme(ACE)

11.Whichdrugisusedtotreatacutegoutattacksbyinhibitingneutrophilmigrationintojoints?

A)Allopurinol

B)Colchicine

C)Febuxostat

D)Probenecid

12.Themostcommonadverseeffectofangiotensin-convertingenzyme(ACE)inhibitorsis:

A)Hypotension

B)Drycough

C)Hyperkalemia

D)Angioedema

13.Whichofthefollowingantidepressantsprimarilyactsbyinhibitingserotoninreuptake?

A)Amitriptyline

B)Venlafaxine

C)Fluoxetine

D)Bupropion

14.Theanticoagulanteffectofheparinismediatedby:

A)ActivationofantithrombinIII

B)InhibitionofvitaminKepoxidereductase

C)Directthrombininhibition

D)BlockadeoffactorXa

15.Thetherapeuticuseofnitroglycerininanginapectorisisbasedonitsabilityto:

A)Increasemyocardialoxygendemand

B)Dilatecoronaryarteriesandreducepreload

C)Blockβ-adrenergicreceptors

D)Inhibitcalciuminfluxintocardiaccells

16.Whichdrugisaselectiveserotoninreuptakeinhibitor(SSRI)?

A)Imipramine

B)Sertraline

C)Trazodone

D)Mirtazapine

17.Theprimarymechanismofactionofmetforminintype2diabetesis:

A)Stimulatinginsulinsecretionfrompancreaticβ-cells

B)Enhancingperipheralglucoseuptakeandreducinghepaticgluconeogenesis

C)Inhibitingα-glucosidaseintheintestine

D)IncreasinginsulinsensitivityviaPPAR-γactivation

18.Whichofthefollowingdrugsisabenzodiazepineantagonist?

A)Flumazenil

B)Naloxone

C)Physostigmine

D)Atropine

19.Themajorsiteofactionforloopdiuretics(e.g.,furosemide)isthe:

A)Proximalconvolutedtubule

B)ThickascendinglimboftheloopofHenle

C)Distalconvolutedtubule

D)Collectingduct

20.Theantiviraldrugacyclovirprimarilytargets:

A)HIVreversetranscriptase

B)HerpessimplexvirusDNApolymerase

C)Influenzavirusneuraminidase

D)HepatitisCvirusprotease

21.Whichβ-lactamantibioticiseffectiveagainstmethicillin-resistantStaphylococcusaureus(MRSA)?

A)PenicillinG

B)Amoxicillin

C)Vancomycin

D)Cephalexin

22.Theantipsychoticdrugclozapineisassociatedwithasignificantriskof:

A)Extrapyramidalsymptoms

B)Agranulocytosis

C)Tardivedyskinesia

D)Hypertension

23.Themechanismofactionofstatins(e.g.,atorvastatin)involves:

A)InhibitionofHMG-CoAreductase

B)Activationoflipoproteinlipase

C)Bindingtobileacidsintheintestine

D)Inhibitionofcholesterolabsorption

24.WhichdrugisusedtotreatParkinson'sdiseasebyincreasingdopamineavailabilityinthebrain?

A)Levodopa

B)Donepezil

C)Risperidone

D)Lithium

25.Themainreasonforusingcombinationtherapyinthetreatmentoftuberculosisisto:

A)Reducetheriskofdrugresistance

B)Enhanceabsorptionofindividualdrugs

C)Minimizeadverseeffects

D)Increaseplasmadrugconcentrations

26.Thelocalanestheticlidocaineblocks:

A)Voltage-gatedpotassiumchannels

B)Voltage-gatedsodiumchannels

C)Ligand-gatedchloridechannels

D)Calciumchannels

27.WhichofthefollowingisaprodrugthatrequiresactivationbycytochromeP450enzymes?

A)Clopidogrel

B)Metformin

C)Propranolol

D)Insulin

28.Theantiemeticdrugondansetronactsasanantagonistat:

A)DopamineD2receptors

B)Serotonin5-HT3receptors

C)HistamineH1receptors

D)MuscarinicM1receptors

29.Theprimaryadverseeffectofgentamicin(anaminoglycosideantibiotic)is:

A)Hepatotoxicity

B)Nephrotoxicityandototoxicity

C)Cardiotoxicity

D)Neurotoxicity

30.Themechanismofactionofomeprazole(aprotonpumpinhibitor)is:

A)BlockadeofhistamineH2receptors

B)InhibitionofH⁺/K⁺-ATPaseinparietalcells

C)Neutralizationofstomachacid

D)Stimulationofbicarbonatesecretion

31.Whichdrugisusedtoreversetheeffectsofheparinoverdose?

A)VitaminK

B)Protaminesulfate

C)Desmopressin

D)Aminocaproicacid

32.Theantimalarialdrugchloroquineactsby:

A)InhibitinghemepolymerizationinPlasmodium

B)Blockingfolatesynthesis

C)Targetingmitochondrialfunction

D)InhibitingDNAsynthesis

33.Theβ-adrenergicreceptoragonistalbuterolisprimarilyusedfor:

A)Treatinghypertension

B)Relievingbronchospasminasthma

C)Reducingheartrate

D)Increasinggastrointestinalmotility

34.Theimmunosuppressivedrugcyclosporineactsby:

A)InhibitingT-cellactivationviacalcineurininhibition

B)DepletingBcells

C)Blockinginterleukin-2receptors

D)Suppressingmacrophagefunction

35.Theprimarymechanismofactionofwarfarinis:

A)InhibitionofvitaminKepoxidereductase

B)ActivationofantithrombinIII

C)Directthrombininhibition

D)Blockadeofplateletaggregation

36.Whichdrugisanon-steroidalanti-inflammatorydrug(NSAID)withselectiveCOX-2inhibition?

A)Ibuprofen

B)Naproxen

C)Celecoxib

D)Aspirin

37.Theantihypertensivedruglosartanisanantagonistat:

A)AngiotensinIItype1(AT1)receptors

B)β1-adrenergicreceptors

C)Calciumchannels

D)α1-adrenergicreceptors

38.Theanticonvulsantdrugphenytoinprimarilyactsby:

A)EnhancingGABAergicinhibition

B)Blockingvoltage-gatedsodiumchannels

C)InhibitingNMRIglutamatereceptors

D)Activatingpotassiumchannels

39.Theantifungaldrugfluconazoleworksby:

A)Inhibitingergosterolsynthesisvialanosterol14α-demethylase

B)Disruptingfungalcellmembraneintegrity

C)Inhibitingchitinsynthesis

D)BlockingfungalDNAsynthesis

40.Themechanismofactionofinsulininloweringbloodglucoseincludes:

A)Stimulatinghepaticgluconeogenesis

B)Enhancingglucoseuptakeintoskeletalmuscleandadiposetissue

C)Inhibitingglycogensynthesis

D)Promotingketonebodyformation

41.Whichdrugisusedtotreatopioidoverdose?

A)Naloxone

B)Flumazenil

C)Atropine

D)Physostigmine

42.Theantiarrhythmicdrugamiodaroneprimarilyactsby:

A)Blockingsodiumchannels(ClassI)

B)Blockingβ-adrenergicreceptors(ClassII)

C)Prolongingrepolarization(ClassIII)

D)Blockingcalciumchannels(ClassIV)

43.Thediureticspironolactamisa:

A)Loopdiuretic

B)Thiazidediuretic

C)Potassium-sparingdiuretic(aldosteroneantagonist)

D)Osmoticdiuretic

44.Theantineoplasticdrugmethotrexateactsby:

A)Inhibitingthymidylatesynthase

B)Blockingdihydrofolatereductase

C)AlkylatingDNA

D)InhibitingtopoisomeraseII

45.Theprimarytargetoftetracyclineantibioticsis:

A)Bacterialcellwallsynthesis

B)Bacterial30Sribosomalsubunit

C)Bacterial50Sribosomalsubunit

D)BacterialDNAgyrase

46.Thedrugusedtotreatacuteadrenalinsufficiencyis:

A)Prednisone

B)Fludrocortisone

C)Hydrocortisone

D)Dexamethasone

47.Themechanismofactionofsildenafil(Viagra)involves:

A)Inhibitionofphosphodiesterasetype5(PDE5)

B)Activationofguanylatecyclase

C)Blockadeofα1-adrenergicreceptors

D)Enhancementofnitricoxidesynthesis

48.Theanticoagulanteffectoflow-molecular-weightheparins(LMWHs)isprimarilydueto:

A)Inhibitionofthrombin(factorIIa)

B)InhibitionoffactorXa

C)ActivationofproteinC

D)InhibitionofvitaminKepoxidereductase

49.Theantidiabeticdrugglipizidebelongstowhichclass?

A)Biguanides

B)Sulfonylureas

C)Thiazolidinediones

D)DPP-4inhibitors

50.Theprimarysiteofactionforthiazidediuretics(e.g.,hydrochlorothiazide)isthe:

A)Proximalconvolutedtubule

B)ThickascendinglimboftheloopofHenle

C)Distalconvolutedtubule

D)Collectingduct

MultipleChoiceQuestions(MultipleAnswers)

1.Whichofthefollowingfactorsaffectdrugabsorptionfromthegastrointestinaltract?(Selectallthatapply)

A)GastricpH

B)Lipidsolubilityofthedrug

C)Bloodflowtotheintestine

D)Drugparticlesize

2.Commonadverseeffectsofβ-adrenergicreceptorblockersinclude:(Selectallthatapply)

A)Bronchospasminasthmatics

B)Bradycardia

C)Hypoglycemiaunawarenessindiabetics

D)Peripheralvasodilation

3.Thepharmacokineticprocessesinclude:(Selectallthatapply)

A)Absorption

B)Distribution

C)Metabolism

D)Excretion

4.Whichofthefollowingdrugsareconsideredbroad-spectrumantibiotics?(Selectallthatapply)

A)Tetracycline

B)PenicillinG

C)Chloramphenicol

D)Erythromycin

5.Mechanismsofbacterialresistancetoantibioticsinclude:(Selectallthatapply)

A)Productionofdrug-inactivatingenzymes(e.g.,β-lactamase)

B)Altereddrugtarget(e.g.,modifiedpenicillin-bindingproteins)

C)Reduceddruguptake(e.g.,decreasedporinchannels)

D)Increaseddrugefflux(e.g.,multidrugresistancepumps)

6.Whichofthefollowingarecharacteristicsofcompetitiveantagonists?(Selectallthatapply)

A)Shifttheagonistdose-responsecurvetotheright

B)Donotchangethemaximumresponse(Emax)oftheagonist

C)Irreversiblybindtothereceptor

D)Canbeovercomebyincreasingagonistconcentration

7.Theadverseeffectsoflong-termglucocorticoidtherapyinclude:(Selectallthatapply)

A)Osteoporosis

B)Cushing’ssyndrome

C)Hyperglycemia

D)Immunosuppression

8.Whichofthefollowingdrugsareusedinthetreatmentofhypertension?(Selectallthatapply)

A)Enalapril(ACEinhibitor)

B)Amlodipine(calciumchannelblocker)

C)Metoprolol(β-blocker)

D)Spironolactam(aldosteroneantagonist)

9.Thetherapeuticusesofatropineinclude:(Selectallthatapply)

A)Preanestheticmedicationtoreducesalivarysecretions

B)Treatmentofbradycardia

C)Reversaloforganophosphatepoisoning

D)Inductionofmiosis(pupillaryconstriction)

10.Whichofthefollowingdrugsactbyinhibitingbacterialproteinsynthesis?(Selectallthatapply)

A)Gentamicin(aminoglycoside)

B)Erythromycin(macrolide)

C)Ciprofloxacin(fluoroquinolone)

D)Clindamycin(lincosamide)

True/FalseQuestions

1.Thevolumeofdistribution(Vd)canexceedtotalbodywaterifadrugaccumulatesintissues.(True/False)

2.PhenobarbitalisacytochromeP450enzymeinhibitor,whichdecreasesthemetabolismofotherdrugs.(True/False)

3.Morphineproducesanalgesiaprimarilybyactivatingμ-opioidreceptors.(True/False)

4.Thehalf-life(t½)ofadrugisthetimerequiredfortheplasmaconcentrationtodecreaseby50%.(True/False)

5.Propranolol,anon-selectiveβ-blocker,issafetouseinpatientswithasthma.(True/False)

6.PenicilliniseffectiveagainstGram-negativebacteriabutnotGram-positivebacteria.(True/False)

7.Theanticoagulanteffectofwarfarincanbereversedwithprotaminesulfate.(True/False)

8.BenzodiazepinesenhanceGABAergicinhibitionbyincreasingthefrequencyofchloridechannelopening.(True/False)

9.Digoxintoxicityismorelikelytooccurinpatientswithhypokalemia.(True/False)

10.Aspirinirreversiblyinhibitscyclooxygenase(COX),whileibuprofenreversiblyinhibitsCOX.(True/False)

ShortAnswerQuestions

1.Definetheterm"bioavailability"andexplainhowitiscalculated.

2.Describethemechanismofactionofbenzodiazepinesandtheirprimarytherapeuticuses.

3.Compareandcontrastthemechanismsofactionofheparinandwarfarinasanticoagulants.

4.Explainwhyβ-lactamantibioticsareineffectiveagainstMycoplasmaspecies.

5.Listthemajoradverseeffectsofnon-steroidalanti-inflammatorydrugs(NSAIDs)andtheirunderlyingmechanisms.

6.Describethepharmacokineticsoforalcontraceptives,includingfactorsthatmayreducetheirefficacy.

7.ExplaintheroleofP-glycoprotein(P-gp)indrugdistributionandresistance.

8.Discussthetherapeuticrationaleforcombiningaprotonpumpinhibitor(PPI)withclopidogrelinsomepatients.

9.Comparethemechanismsofactionofselectiveserotoninreuptakeinhibitors(SSRIs)andtricyclicantidepressants(TCAs).

10.Describethestepsinvolvedinthedevelopmentofantibioticresistanceandstrategiestomitigateit.

11.Explainwhyloopdiuretics(e.g.,furosemide)aremorepotentthanthiazidediuretics.

12.DiscusstheroleofacetylcholinesteraseinhibitorsinthetreatmentofAlzheimer’sdisease.

13.Describethepharmacodynamicsofinsulin,includingitseffectsonglucosemetabolisminkeytissues.

14.Explaintheconceptof"therapeuticwindow"anditsclinicalimportance.

15.Discussthemechanismsandclinicalimplicationsofdrug-druginteractionsinvolvingcytochromeP450enzymes.

CaseAnalysisQuestions

1.A65-year-oldmalewithahistoryofatrialfibrillationisprescr