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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 🔍 / 📺 / 🌳 / 📖
tags: Immuno

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 +5  upvote downvote
submitted by sympathetikey(1600)
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D4+C lscle tacivate s-lclBe hhiwc from fslloeicl dan uscea rmnnlaeegte of mplhy deo.ns reee,forTh ni an SIAD e,ptiant ot garleen eht pmyhl oed,sn eht C+D4 fnuoysctnid ustm be elredsov.

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breis  eYa i tge att,h btu fi hte iaptnset C4D swa ~,35 hwo ni eth world did eht C4D cunot rsie ehgnou to smtlteuia B cell ao.tfolr.rnie?i.p I 'otnd get ti +10
namira  Teh loyn nghit i acn knthi fo si t :tahthe c4d nocut taht is gvein swa kenat priro ot inhagv datsetr het eantrviilaortr ehrtyp.a Snic e the iqstnueo kssa tbuoa vp"irmode i,un"onftc mbaey tis fnrrregei ot the raeypth aallcytu gbien itvefceef nda its dmeanag to encaseri cd4 ntouc nda nuictnfo os as to eb bela to etrnuitcob to lyhmp edon nteeglramen edu to mo.cy umiav +13
kamilia20  I uhtgho it nserartf ot a MmpOaomy,Ghl +1
bgreen27  Tihs awnser tnpaniaeoxl ilpiems that nnfyitcusod nmsea airc,ystc trg?ih utB aer eht CD4 elcsl cyultaal atinnlcodusfy ni VIH? or sutj seacr?c I 'dton liek hsti siuoentq uesecab rcealyl ohtb CD4 nad B lcesl rae vdvenilo ni ymhlp oden aeelngnemrt AND fi pvmedori tnnocifu = aneiscedr emn,bru tenh boht B lcesl dan 4DC lslec wodlu teme ttah c.eitarri +1
drdoom  br@ngee27 “dnei”otelp is eht mroe rpeicse mert hree gl(aohuht I dluwo otn eb seuirdrps if 4sDC fo I+VH isnlivuidda weer lsoa wohmsoe dcoylansftinu.) +1
drdoom  ger2n@7be l,aos mrbeerme thta a esginl 4DC anc ievrd teh eoliaprfirton fo yna~~m B llc.se oS, ,sey lymhp oend ganmreleent si evdnir by 4,sDC ubt rilutylav lal of hte mssa is ittalaetburb ot B lelc e.sxpnanio ta(hT ,si if you enpidps tuo an atavitdec pmhly enod nad hent hewdieg all het T cells and nhat geedwih all eht B lse,lc ’duoy fdin hte lmpyh node si ytmsol “B lecl hiw.)e”tg +3
bgreen27  os I khtin I ds,aerudnnt iienttosfylunedc~donp dan aeort"leirs~epcenin in "tocufinn btu nepaioorrtlfi is neihrte reeh orn there auesbce 'its learyl tjsu lBlec co"iu"nnft +1



 +3  upvote downvote
submitted by andremosq(9)
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eoutinQs sska oatub teh aseuc fo het leanrmentge of hmypL ndsoe .. mpyLh odne rrcaxtePoa alegsrne ni na xtmeere lrulaecl eiumnm pseosrne caiarprtc(loa irelsypphaa) taasign uisvr fentdcie llsce 0Fa2P(A.g ).T9 6 celsl rgeeulat cll-e mietead yitmmuin ... D4C T celsl pciaelcfilsy is the ETCIDR lCle nnmemIu os.ernpes 8DC T llce si .cottycoxi

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lulumomovicky  STIH IS ETH AERL IAX.PEONLATN ansThk +
realnorthomfs  reaH ehar! 0F20A2 p69 +



 -9  upvote downvote
submitted by hayayah(1212)
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iceuoyaMtcbmr miuav omlpcxe niitsnfeco ear a mnmooc suptonticpior iotecinfn in itnatesp wthi cddvenaa DAIS CD4( conut 5;l0t)&.

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realfakedreams  yyahaah@ oyu wree bgine ..alzy sm..h oe imH attsedr arioneavrli-rtt r.ypheta HIV tiecfns D4C Tll-Ces rgtuohh heetri R5CC ro rmoe loomymcn C.C4XR cBauees fo -vatrsarteiilnor ttsar ,gwrnkoi IHV isnt bale to fetinc oaynerm D4C T lc.les hsTu C4D t esmylochtyp lslvee sattr to seri nad ear lbae to teaivc B llces. +16
myf1991  yhW n'atc it eb omc?etnoy rmgacehaop eat MAC dna trniacet hwti 4DC +1
weenathon  11y@9f9m I also rcreoiltync soech cstyneom,o tbu fi uyo look at eht tsqoiuen cafeuy,lrl ti si yiciespcalfl inakgs hwat elcl si qeuedirr rof het lpymh noesd ot nraglee, tno ihwhc clle si ignadlnh het tucoyabrcemim imauv iocenntif. nSeic 4CD lscel leisamttu B clels ot iaeflpretor in pmlyh enod csfloli,el chiwh dwuol amek mthe irg,egb +4DC T sellc is eht erasw.n +4
j44n  pohemgcsraa dnto elnegra nodes ni fcat they mkea ehmt s,aemrll liegtn dboy smca ate all the bda B sclle ni a enod so voirdemp mca xfn dwuol asedecer teh onde zsie +
mpel14  oT dda to m@anai,r na fiienuocts eseadsi cdo dierebdcs htis pentocc in an VHI tcrluee reewh eh said ttha rripo to het xT thiw eriatrioanvltr ,peaytrh eht tp sha suhc lwo DC4 utonc that reiht uemnmi mesyst ntocna omfr a pneseros ot het ,tnoecinif dna teraf rehti iuemmn tsymes is vngie a lhsgti boost hiwt the rg,dsu eihtr iemumn stsyme cna yilafln e"s"e teh onnfeicit -g;&t ontmu eresposn &;tg- csseau /SS +



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