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Retired NBME 20 Answers

nbme20/Block 1/Question#23 (reveal difficulty score)
A 34-year-old man who is HIV positive is ...
CD4+ T lymphocytes ๐Ÿ” / ๐Ÿ“บ / ๐ŸŒณ / ๐Ÿ“–
tags: Immuno

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 +5  upvote downvote
submitted by โˆ—sympathetikey(1600)
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4D+C llsce ieatatvc -scBlel hchwi morf filcolesl adn secua geetlmerann fo lhmpy e.dson eroTerfeh, in na SIDA tpe,aitn to ngareel hte lmpyh ,ensod eth DC+4 ntinfscuydo mtus eb ev.rdeslo

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breis  eaY i gte at,ht but fi the ietpnsta CD4 wsa 53~, hwo ni the wlord ddi eht CD4 ucont iers ogunhe to attsumeil B llec for.ni.re.lta?iop I t'ndo get ti +10
namira  hTe olny inthg i can nthik fo si h:ahet tt cd4 tounc ttha si egniv asw aetkn rrpio ot gvanhi artsedt eht ealovriiartrnt prta.yeh e Snci teh ntuieosq sask about emdrpv"oi fn,toc"niu yambe sti frginrere to het rytahpe lualycat nbeig eeeitcfvf adn its angemda ot searcine c4d ocutn and cniofunt os sa ot be beal to ruboeittnc ot yhpml oedn eemnergltna due ot cymo. muiav +13
kamilia20  I tohuhg ti resafrtn ot a po,GMhOalmmy +1
bgreen27  ihTs rnewsa xaoieanlnpt epsmlii htta utonsdciynf nemas crytci,as g?hitr uBt aer eht CD4 selcl tuaylcla ysaluftcdinon ni IHV? ro tusj ?cascre I on'dt ielk tshi uneqisto eacsbue laeyrlc btho C4D nda B lclse are oidnlvev ni hlypm onde rgenteelanm DNA if mpdieovr itcufonn = aeicnresd bemu,rn neth obth B lscle adn D4C lcsel udwol emte taht iracter.i +1
drdoom  be72r@nge eโ€dpneoโ€œlit si hte orme creiesp etrm reeh ulaghh(ot I odwul tno eb sudprsrei fi CsD4 of +IVH ulnadiiisvd wree olsa oemhwos udtcsafl.onyi)n +1
drdoom  brne7g@e2 ,aosl reemmbre taht a elsing C4D nca ivder het oalpnrforeiit of ~a~mny B l.clse ,So ,sey mphyl oend emengnlrtae is idrnve yb CD,4s tub iluylrtva lla fo eth smas si baiutttbarle ot B lcel xpni.esona Tht(a ,is fi oyu edspnip uto na tvcaeiatd yplmh oend dna hetn hiedweg lla hte T lecsl dna naht wiedegh lla eth B sl,elc yuโ€™do ndif hte hyplm neod si slymto โ€œB cell .hโ€w)teig +3
bgreen27  so I tnikh I unestrddna, iipnuonnleoefyds~cdtt dan nteee"aleornsiri~cp in c"unfoitn ubt ooreifntailpr is hinrtee rhee ron ether eauebcs ti's yalrle sjut Bclel uofi"nctn" +1



 +3  upvote downvote
submitted by andremosq(9)
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sntQoieu skas otuab the uecsa fo hte aereemlgnnt of mphyL deons .. yphmL doen erPcraatxo rnglseea in an mxteere lellucra nimmeu osprsene aaaprclci(tor aasy)ppirhle giatnas suvir ifecdnet lscle PF02agA(. 6T) 9. eclls lergeaut lcel- aeiemdt inmtmyiu ... DC4 T slelc elipaclscfyi is hte CDERIT llCe nmIneum spn.erseo D C8 T ellc si xcti.yootc

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lulumomovicky  THIS SI ETH LEAR NXLOT.PAAIEN Thaksn +
realnorthomfs  reaH a!her 0202FA p69 +



 -9  upvote downvote
submitted by โˆ—hayayah(1212)
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itMeuyrcoamcb miauv opxcelm ecsinnotfi rea a oonmcm tutnpirspocio enniitfco in taetsnip hwit cndaevda SDAI 4D(C outnc &;t5.0l)

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realfakedreams  hhya@yaa uoy eewr ibegn .lay.z hs..m eHmoi dtaesrt talvrietarnrio- tareyhp. HVI ictnesf 4DC TsleC-l urhohgt rtehie 5CCR or erom lmnyocom .4CRCX uaBeces of ristetivar-rnola rastt gwrikn,o HVI ntsi beal ot eitcnf eaynomr CD4 T selc.l hsuT DC4 t mchpyoltyes elsvel strta to isre dna rae lbea ot avitce B lcel.s +16
myf1991  yhW t'cna ti be menoc?oyt moghpraeca tae MCA dan anecritt tiwh DC4 +1
weenathon  m1f@9y19 I aosl oycircreltn ehsco soomcte,ny ubt if yuo olko at eht ueoitqns lalefyrc,u ti si lcpisifyclae igansk hawt lcel is duerierq orf eth myhpl deosn to ee,lganr ton whihc llec si ndnhaigl hte aoccemrmtuiby mavui oetinc.fni inSce 4DC leslc ulsmiatet B lcsel to farpitelreo ni hpylm oned oisllefl,c whcih udwol amek hetm e,ggibr +4DC T slcel is the s.enwra +4
j44n  cgspmaerhoa otdn eerlang esndo ni aftc they eakm emth la,relsm ltgnie dybo mcas aet lal the dba B sclle in a oned os pivoedmr amc xnf owuld eesaecdr eht deon seiz +
mpel14  To dda ot a,@imran an cifnotsuei iasedes doc rsdibcdee iths ceontcp in na HIV cetruel erewh he dsia ahtt iorrp ot het Tx htiw aieirrltvatorn ,yhpeatr teh tp sah shcu olw CD4 octnu atth heirt miuenm yemsts tncaon mofr a eronpess ot eht cifiet,onn dna tfrea etihr imemun tmysse is nevgi a tighsl tboso iwht het r,dugs erhti iemmnu smeyts anc ifalnyl e""es het ienntcfoi -> nomtu pseesorn g-t&; assceu SS/ +



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