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Retired NBME 21 Answers

nbme21/Block 4/Question#23 (reveal difficulty score)
An investigator is studying the regulation of ...
Intravenous infusion of 0.9% saline for 5 minutes 🔍 / 📺 / 🌳 / 📖
tags: immuno Saline Lymphatic

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 +23  upvote downvote
submitted by andro(269)
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Fsitr ntoPi : Lpymh osfrm ta eht aCairplly lelve fo bodlo slesves ( as hsit is eehrw udilf omves in dna tuo fo sesselv naolg ihtw ttoeisbmale nad snruneitt ) .

heT fconiunt of mplhy is to unterr csxees rpnteosi nda rtlantisitie idful bkac to teh ebdrtmloosa ( llceaR mpLhy laeltnveuy rnisda inot het eargl e)svni

edScno itPno : We yma eeiasnrc hpmly htreei by rgicaiesnn .1 het rtae at hicwh we mofr it . 2. cDsaerengi eth reat of igedraan ( .ie - citurgbtons hylpm lssvees )

oT enirsaec lymhp ainoftrom we aevh to ciseaenr eth trae ta cwihh dufil freslit tuo fo teh iielslcpraa . sThi nac eb deon by itagenlr igSntsral ecsrof ni the yillcrpaa

  • Irenagcnis rsdtihocaty upersser
  • giaDeecnrs ictcnOo peserrus

gGoin rhguoht the niotpos
piOton A : eildtnhnoE will ecasu rasnvosictcionot fo alnmorPuy rryeat hTi.s si lyipeprlrcaa annmegi ew iwll heav lses boldo/ luidf ngetgit to the saplecliria - daseredec tihdarycsto ersrspeu nda drceedsae mlhpy roiofntma
ipoOnt B : ritnstcConoi fo omayurnlp aeryrt agian
n tpOoi C nad D : eadl ot eth ygpcliisoho soernpse of xiyhopc csisovcaotonirnt
inOotp E : eInsrcaed citnoco pssreure rsseeeadc teh uonamt of liduf oivnmg tuo fo ierclpalais

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lovebug  onw I atnr~usd~!!nde THX ): +2
limberry  I evieble you anem Oiont"p :F scraenedI otioccn eessrpur scsederea the motuan fo luidf ovimgn otu fo sallae"cirpi sntadei of ioptnO ,E i?rhgt +3
weirdmed51  sYe . lAimunb kaa ic.oolld +



 +18  upvote downvote
submitted by hayayah(1212)
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mphyL wolf rate is slluayu l.wo tI si fieundcnel alripymri yb the atre fo hpyml onf.amiotr orF lxaee,mp fi boodl aayllicpr persesru is nsreedcai by raieralt svioadtnlioa or snueov toicnrsc,ntoi the fwlo tare of mphyl csaeeisrn. ,olAs hte olfw ater si fcetedfa by cepismonsro of lmtihypcas yb nictotrncoa of bgoiehnnigr sacuuurtelm nda yb tgenevia ttnccirriaaho erpsusre rbna)gti(.eh

nlttaiItresi sureeprs (so eeusrrps in hte EFC, hwcih oulwd aserncei fi veing IV i)lneas dna pymlh olfw era oyptilsevi dt.leare A llsam criansee ni sterttlaiiin lvuome aegrtly recseaisn tis eu,ersrps timgronpo ypmlh fowl htta ctsa ot setrroe eht lrtitniseiat ueovlm ot .onmlra

omer no htsi opcit: sin58c./p.knmn/hihw3o.ts:bo4v/wg4Btb/K/.Nlow

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linwanrun1357  Do nto ndeudrnats the greinbhat ccoe(hi C nad bDaret)h ni dna uto rae dnefrfie?t +
khanhluong  I ntdo' nwok if i'st coertrc ro nto utb how I prhadepcao C ma&;p D wsa ttah htey othb eucas icoorasnotcivstn ni teh elsaoirter eseaub(c ihst is eth gunl erhew xhypioa uescas oov,cscni)rointats hichw redcsaees aycdtsrotih esresrup hgrtuho eht slepialrica and etnuevally saesceder mlhpy wl.of aMybe I tlcylpemeo otg tish ueqitons hgitr rfo ngwor esrnoa, tbu I ltef ttha ti krows ithw lla fo eht waes.rns roF )F I aws nnihitkg hatt ti oldwu auecs sarceedni icyalpral oocntci prseeusr hihwc suseca mreo ildfu ot og oitn teh ipcllaayr nhta ntio teh pmyhl ..ls.evses ers H'e a up:cirte .1on/0u2hgmwoiamag0oyct/hwthp/.scd/pesmapi9btd//mwopl-nw/l1tey:c.pfLtel +5



 +8  upvote downvote
submitted by drdoom(1206)
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oincsncaoVtitsor (airnwngor fo a )tebu lwli aescu hte lfwo aret ot nceaiers grhohtu atth ubet, cwihh rsedcesea dlwtoaduiara/r susere.pr hTe arefts a dflui meovs htugroh a u,bte hte ssel t”ow“duar orcef it ee.trxs T(hsi si kownn as eht uVeirtn efftce).

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hungrybox  otn gniees owh siht is nevaletr +9
sympathetikey  es'H wonhisg how A ap;m& B rea irontcrce urgo@yhbxn +7
nerdstewiegriffin  tawh a noorm nxr@gybhuo is !! +2
leaf_house  TMAC slchbafksa no shti eimag +1

I think the more correct explanation is that lymph mostly is hyrdostatically pressed out of the thinner walled small arterioles, capillaries, venules

If you vasoconstricted the pulmonary arteriole, youd get hydrostatic backup but not into the smaller arteries, capillaries, veinules but actually less flow (due to constriction) and less lymph formation.



 +6  upvote downvote
submitted by d_holles(218)
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2%0 ibanmlu is RYPHtncoEi nad esausc dwgnari of uildf uot of the ttnmiuretsi nad inot the oo.bld

uiAlm"nb anmH(u) %02 is iindeatcd in eth ncemygeer entemtrat fo imhelyvopoa itwh ro tutiwoh .oskhc sIt efenticssfvee in vsriegnre aehvmiopoly sdedpen yagerll unpo ist baltiiy ot ward tstreaitlini ilufd onit the .ioclurtcnia tI is tmos cvfteefie in epntsait how ear elwl y.adhdtre nhWe dlboo lvuome cdtfiie is teh ulters fo rgehom,raeh otaelcbpim der bdool lcels or lhewo odbol hlsodu be idsiermadetn as ciqkylu as biols.pe"s

/hlurtnwocadrhmmpmwas/w0o-h2:lpmub.u./gst-n.i/t

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 +5  upvote downvote
submitted by assoplasty(108)
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saocVtcoitnrosni daresesec ldobo wlfo dan shtu radseesec ttayihdoscr rp.esseru eSmes oneucrt iutiievnt ubt I adh to olko thsi up raetf I tog it worg,n .oto

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 +0  upvote downvote
submitted by bgreen27(6)
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nCa snemeoo ehpl a brtehro ot?u My tnihgnik aws taht nedisaerc ludfi in eth arilseiitntt desla to ieacenrsd ,hpyml os I ohtghut hyte erew kngiool rfo snhgitmeo ot ulesstima hghi eutadilt payrulnmo daeme or etrraial onamryulp N,TH hhwci I am pretty resu othb lade to uynarmplo .aemed herWe idd I og ng?wro

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ali_hassan  ihts mgith eb pditus tbu i got it ihtgr itwh thsi isrecr:ianelaa etno al"nrom" ifdul 9%0(. nsieal) in ybdo = iersaenc pmyhl wolf. lyaetublso no meliadc neoctcp to it, jtus ioclg oll +



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