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Retired NBME 20 Answers

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submitted by hayayah(1212)
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In redor orf a gudr to eb lcdraee yb the ek,yndi ti mtus isrft eb idreleft ni the lmg.eiolur gsrDu thwi a hhig VD ahve emro of the gdur ni eht essitu ttah ear nto eaivlblaa to ieldtfre yb hte endk.iy sgDur wiht high rpoteni dninibg t'won eb letdrfei eireth. So yuo twan a grud wthi low Vd dna wol niignbd if uoy ntaw it dercael vai teh kyindes nda n.uire

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zevvyt  uBt a owl DV scrpdoersno to ghih Paaslm dnBigin trnnt(coaAneFoCi 332, 019)2. shatT' ym main nfionsouc wiht isth nstuoe.iq +3
kevin  If ts'i high ampals biinngd, tneh s'it olw d.V ,But lwo DV 'nstoed syrneicasle eqrruei hihg smlaap gi.idbnn wLo dV anc smliyp be ued to ti gbeni a garel aplro eomleulc +3
topgunber  So yuo eht oinfncsou is ttha DV fo 1 seanm it systa ni hte tuircnacil/o naaaicturvlsr .netpmtrmoca Tshi ldwuo ekma uyo hitnk htta it wlodu ndbi lihghy ot iptroen ni subacee of eth low DV. utB im smuiangs fi it bondu stopiren it wuldo ton be crealde yb eht ,eknydis os fi ihst dah a wlo VD a(nc eb arcleed at rlsom)lugue nad fi ti bnudo aplmas sniretop eykawl llowa(s het iynekd ot lterif eht sa)bnuetsc hent ti nac eb idtreefl tino hte ltburau nme.lu woN eht .kpa asBes nehw oraeottnpd hp( uredn hteir a)pk mbceoe a,gcrdhe wlehi casid at hp neudr irthe pka get ptaorntedo are CH,NERADUG ganniem in cdiaic reuni casdi cemeob oemr cipiolllpih adn anc feidfsu otu fo eht trlauub m.lneu fI ew mdae teh rinue moer bis,ac nhte ew antw ot rpdteaoetno eth caid p(h eigrhh nath pka) so ti lwil menair stukc ni eth rluatub muenl as an oni. +



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submitted by charcot_bouchard(574)
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apK is Hp at hhiwc yan urdg is at tis 5%0 ziondei tet.as

Nwo ew ear lka nieur ei. nic .pH hnew &;tpgpKHa ti lwli ehav two iffd ahpt rof ccadii gurd pam;& asicb d.urg

Accdii rudg wlli cni sti ianmioenilt (nci zdneioi mf,ro) bcisa ugdr iwll eb ermo abo.b sosedr we need to nkow teh gurd si bacis i./ccdia

oNw fi u lak eriun sti iiamoienltn c.ni os ti eavh ot eb di.iacc or u nca know tsi a dois tasl of drug whit NCS rtopyper i.e tmso liek belPiaahrotbn Wkae( ad)ic

os if pKa fo gdur si a-6-t- Hp 7 we wlli atstr minleigitan

btu if Kpa si 0 we deen to aeirs pH fo eunri at 11 to rsatt tniitm.aalgnie atth tpion revp udgr a()Kp=6 wulod eb ltyloat tou fo mysset.

tshta hyw A si eth trgih ans pK(a = )6

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charcot_bouchard  Cocierotnr : Not 0. i emsan if apK si 01 +3
charcot_bouchard  n2d pteaud : cont ot enalr loosch gaedr c.meh fi Kap ;g&t 7 ti is .ebsa adn if pKa si < 7 it is daci. ceSin ew shteiblsdae eht rgdu ehav ot eb a wkae caid Kap cnta eb rmeo ahtn .7 +
dbg  hs,ntak but kPa dan PH rae not at all eht msae gnith +2



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submitted by monoloco(155)
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If yuo awnt ot elrca a gru,d ti si aopblyrb sbet atth it otn eb dbonu to soeirpnt so( htta it stge ietrefl)d nda it ahs a wlo omvleu fo btiointsriud (os ti t'nsi ni eht e,ped darh ot ercah iu.)essst

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kingtime9119  tuB tath s'doetn akme ns.ees ageP 332 fo srFti Adi 9021 oditine lcyrlae estats hatt eigbn maplsa trpenoi ubond acterse hte ostewl evulom fo isiin,utordtb uacsebe ont gnieb nboud ot sprtinoe eicnasesr teh echcan it iwll ecrah eepd tion het sseusti ebfoer ti scerhae eth i.dkyesn ysercpaDcin iwht tFrsi id?A +
haliburton  my rnaoinesg swa ipcmraong wot gursd, btoh hwit Vd fo 1, teh grdu with the rwoel baunlmi inbndgi uwdlo be rceedla treafs kn.e@gtmii I otn'd hnikt ur'eyo iigdnroecsn htat A dan B hvae quael V.d +8
whyisthis42dollars  igBen pmalsa ounbd mya tracee hte ltoesw ,Vd btu ti en'stod aenm tsi' ggoni to be iteefrdl yb het .ednyik eamS snroea ywh n-pdburooetni cmcilau stn'i iefterld yb hte e.dniky orYue' tgintge oto ghun up no ,dV tbu sth'at lyon eon rtpa fo hte oenuqait eh.er +



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submitted by lispectedwumbologist(122)
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aCn soeodbym laespe panexil yhw eth Kpa ash ot eb 6 esinadt fo ?01

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masonkingcobra  cSeni na zneoiid form is aecdhgr (by eidtif)onni, ti lliw tno iylsae rssco a olpnrnoa ipdil emer.manb ,uhsT it si aitmrtonp ot egeicornz hte leointpta fo eth gudr to izeino ni ordre to rtcidpe sti sulitoiybl dan hte gedree ot whcih it anc be bedorasre.b heT grdeee fo iiaonntzoi is dntimedere by the rsgd’u aKp nad eth Hp fo its otenmrnine.v ekaW aidcs nda asesb rea 5%0 ioizend dan %05 uidzoinne wenh eth snrrnudoiug pH luesqa eth dgrus’ aKp. tA 2 pH usint baoev or eblwo the paK fo het ,rugd anelry 100% fo eth ugrd si odeizin ro in.dnoiezu +4
masonkingcobra  aBicalysl waek casid rea btse deexcert ni lknelaai ,nreiu ubt ewak bessa rea cedtexre moer aedirly in iacd en.iur +
masonkingcobra  In a,yrsmmu abeucse hsit si a keaw cadi ta paK ,6 maignk het irnue ellkania will sruelt ti ist innaziioto nda centreo.ix zeIndoi ncta moev ghturoh dipil enarmbmes os at'cn etg oaerdsbreb nad si piseds .tou +20
yex  nwogloFli on kornaocmgbnisa nlpea Aian:txo Kap -49 acn eb tehrie kawe ciad or Wbke s.aae iadc Kpa -;47 tnrgos diac Kpa ae 1-3Wk abse Kpa -;79 stogrn baes paK above ferDetns9 fi Hps: :schtmao 1-2 oueumnd:d 53- lyera mjenu:uj -75 tela uj:eunjm -79 eim:ul gt;&9 :ineur - 5k8.Wa4e dasci p()Ka gste asdeobrb in cciida )H(p snrinevometn dna lardece in ai.bsc kWae bessa steg asodbreb ni bsica innsremtveno dna eclarde in aic.dci THIS DESO TON LPPAY TO GTRSON EASSB OR !DTS!eA!CI! h best poaalextinn rof hsit si a ciBmeho utecerl rfom aPss armrPog dna it si ailaealbv on ,uobuYTe sti nlog utb it si orf usre thwor it!! okoL orf 19 estirhyoimBc 1 mfro assP graPomr no Tuob.uYe +3



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submitted by chandlerbas(118)
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itlgarh elst do .sthi emos fo the mcsotnem eewr eryall well lipe,dnaxe verwohe mi igogn ot try ntreaho uotre. tsle edla whti Kpa inecs eht htore smectmno ieaelxpadn Vd lewl n.eugoh kodus fllflss/o.leae

sitfr ighnt si you hvea to etiremden if tis an daci or sabe. 0%9 fo teh teim its ggnoi ot eb a aekw ,idac we mepsli ntod lartufmeo mhcu atcdniomeis sa sbsea in la.nrgee olas sti umsoid ltsa and NSC so ouy wokn it sah to be ba.ehirblapton pets 1() wol Kap nsmae aidc )(7-.4 ouy msut wonk h.ist )(2 yuo utms wkon ttah lal saicd ttrsa off aulnret nda ethn lsoe na ino gt&-;- onbiegmc eghrdca. nad all ebsas attsr off dhcerga dna enth olse an nio ot cembeo aurlent ths(i is why ew nodt seu scbia drugs esuceab hist latuner ehcgra sah a ihgh dv dan pedssito ni essiuts = abd in y.e)lerld yuo anwt cegdrha cb tsaht athw si hoyldphirci kaa pee ti o.ut (3) entx esu what i jtjus iasd and alpyp it ot sthi rtca:h

2+ = 99%

1+ = 90%

1- = 01%

-2 = %1

het rtisf bernum nprseeetrs eht eefedncirf eentebw Hp dan Kpa K(ap si ivneg by eht ietsouqn a),ylswa pH is thaw oyu cgdnhae nhwe oyu lkzldaanei eht e.niru so ofr siht uiosetqn it owdlu b:e KH-app = ghih asibc uveal ;(7&g)t nusim kap ( awke acid -).74

own teh sonecd grecntapee seertrnsep het naeprcgtee fo ctisoedidsa pnot.or os for an ci,da ethy lilw eebcom gr,edahc tsih sneam ttha fi teh idceffener teneweb the hp dan paK si vero +1 tneh %90 of het acid wlil go rmfo taernul to daherg.c fi eht hp is 2+ egatrer nhat KpA nhet 9%9 of eht idca iwll vhea ltos its oonrtp and ebmoec dchraeg

stle rezsmaumi h:its rewe oltd sti a aekw acdi = kaa apK eentebw .-47 we tawn ot egt ot eakt eht eakw acdi omfr tis nlauret rmof noit a cghdaer rfom to get rid of .ti so we alklanazei hte r,uein cesuaeb sbsae rae hrgehi Hp uoy wlli get a ermo + rnmeub suth hte wkea daic illw og frmo nuerlta to caghdre nda be crte.dexe

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submitted by strugglebus(189)
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I was idewonrgn fi it was to olwla for ltairpa NSC tpnionrteae isenc eht grdu is lsysuopepd dupsseop ot veah CSN fcetfe

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submitted by sha2507(0)
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for eakw pakcd sp=Hia + olg ))(A/AH-( aak onhenreds chashsebla afe iqtunio ouy oselv ih,st l'louy tge hatt Hp - apk = )lo(Hn/ (Ad)-Aga etnh gniaa ouy lwil gte 10 ot eporw ph - kap = .A/H-A [Rrfee ot nlki ni t omensc]nomw gdeoiscnrin taht het hp fo rou dbyo si .73 nigm heeot,ws can selvo for pka 10 nda kap 6 iusng tshi Tlamohru aft. is rof kpa 6 nad boyd ph 73., it lwli eb 01 to teh pwreo of 13., lwduo anme htat AHA/ atrio is a tsoveiip nrmb,eu mpgiilny ttha A- g;t& .HA sehewa r rof wnhe kpa is ,10 the A/H-A tnriao is 01 ot orwpe fo -,7.2 imnagne taht ;.AtAg-&H

nAd sa eardlay tmoneiend in eth bveoa montscm,e ew eend na ncoiic orf,m ot tmeeainli het g,dur it uwodl be eedfprrer fi eth pak si 6 sa ni htta asc,e (-)oAniic udlwo be in rome r.cnotoinnatce

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sha2507  /nrbdr-syssck:pu-v/au/-.eowreor/d-muewrhhfy-ifletsl/euifehi/hhnit-oimbosanbqcdscp.inb-ua-agfaatsfte/oeaairir/npcctsmwklieprf ere to shit ,dieov ot adtnrnudse ti a elttil r,ebtte and rof eth mrolfua ihwt het a,btle sipk ot 267: +



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submitted by kingtime9119(0)
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cmt[onme dmvoe to ncometbu]ms

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submitted by sway(0)
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so tahw if tsih swa evrsdeni hrwee het dugr ni tqueonis aws a besa adn atht eruni saw ie.icfaiddi knwo eht Kpa duolw dene ot eb tg;&7 utb what outab hte pH

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submitted by haliburton(224)
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cmnemo[t mdvoe to bmncstemo]u

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