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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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itrsF oPint : mLhyp fsrmo ta eht lCayiarpl eevll fo obdol vssesel ( as isth is rehwe uidfl msevo in adn tuo fo eslevss anolg whti ebeosmttail dna tiunrnset ) .

heT ucntonfi fo yhplm si ot teunrr exessc otsirepn adn ettraliisnit idflu ckab to teh rdmsetoobal ( cRlale mLyph vlulayente rinsad tnoi hte eragl ines)v

eodcnS Pitno : eW may rseiecan mhylp reihet by esiragninc .1 teh erta at hhiwc ew rfom ti . 2. Drecsnigae the tare of iradnaeg ( e.i - ngitctusrob mlyph elssesv )

oT cneirase hmylp aformntoi we veha to ecinarse het reat ta whcih fdiul sftlrei otu fo eth ilersaaclip . hsiT acn be neod by aniegtlr itgSlsnar rsofce in eht lyrpalcia

  • cinnrasgIe tyithodcsar rseserpu
  • ngDeeisarc conictO surpeser

oingG gruhoth eht oisontp
pOnio t A : lhtdennoiE liwl ceuas otnitvcinoroascs fo yrPaoumnl rytear .This is lipralecrayp nganeim we lilw heva lses lo/bod fdiul gnegtti ot teh iasrcleplia - resdaceed hrtiotyscad usesrper nda seddecaer lhymp mfrnatoio
pnOtio B : ortinCsitnoc of npuoamryl eryrat anaig
pi Oont C adn D : lead to the iolhiogspyc pnrsosee fo pyocihx otnstirvaiosconc
oOntp i E : ednceIrsa octoicn sresruep eredsasce het notmau fo ifdlu gmvoin tou of rslcaipleia

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lovebug  now I ~ard!sute~dnn! XHT ): +2
limberry  I eivelbe you mane n"Oitop F: Idcnaeres oinctco srseerpu ecrdesaes het moutan of lfuid vmnigo tou fo ri"plaaselci nteaisd of Otipon ,E rtg?ih +3
weirdmed51  Yes . lbunimA aka io.dllco +


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 +18  upvote downvote
submitted by hayayah(1212)
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yhpLm fwol atre is lsayluu l.ow tI si ueieclndnf maiylprri yb teh etar of lyhpm rtnoam.iof Fro ml,eaexp fi bdool iyapclrla sursepre si aneidescr by airltear vinitaaosldo or vsoeun octnntociri,s the wflo tare fo lphmy cne.esaris Aos,l the olwf rtae is fcaetfed yb snopercsmio fo yctmpahils by ctaoconnitr of hbgirgoenin tuemaucrlus nad by eitevnga taciatircrnoh esspreru tbngea(h.)ri

erlatiIsitnt rspseeur (os sesurper in eht FC,E hwhic udlwo necrisae fi eving VI nlaeis) dan mhlpy wolf aer voepltiysi r.daetle A llsma esirecan in slantettirii vleumo tgyrlea incseresa sti rrssep,ue pmrioognt hymlp wflo tath atcs to estrore eht tiirealsttni ovemul to l.nrmao

eomr no ihts :pctio 8n.KgmN.whtkplo3b/ibtnwon5i/w:44/svB./o/c.hs

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linwanrun1357  oD ton rtnsaunedd het brgeniath hoceic( C dan r) haebDt in adn uot era ?fetirefdn +
khanhluong  I o'dnt nwok fi i'st tcerrco ro not btu who I caohppdear C ap&m; D wsa atht hety boht ecuas cnivatioscotsron ni hte eserroiatl csueabe( tshi is the glun eewrh pihxyao escsua o),siaottcnscrionv hiwch esacrseed oydtrhicsta srrpeeus ohutghr het reciapislla nad envtlyulea rseedcaes lypmh ol.wf aMeby I tpocelylme tog shit tsoqeniu irhtg for wgrno neoas,r but I tlfe atth ti owsrk iwth all of teh rwa.nsse oFr )F I swa igktnhni taht it douwl asecu iecnredsa llicparya oocitcn essueprr wihch secaus eorm ifdul ot og iotn hte laacpryli athn tnio eht hlmyp l.e..svsse Hrs 'ee a ter:upci imhhltadnmLg/osolt.npwedat/i9em:f/u.cysbm/h0pot/c2olgpaewp1ypwt/c/-w10. +5


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 +8  upvote downvote
submitted by drdoom(1206)
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ntntoaicossriVoc rnnwag(roi fo a btue) ilwl caues the fwol aert ot niserace rohghtu htta ,etub hiwch sdacesree wrirudltadaao/ reeur.ssp eTh esfart a fduil vemos hogthru a ,bute teh ssle otwrd“”ua cerfo ti .srxete sThi( is nnkow as eht rntieVu ffctee).

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hungrybox  nto nsgiee hwo stih si eralvtne +9
sympathetikey  'Hes hnsgiow hwo A & B rae cntrecior ngouxrybh@ +7
nerdstewiegriffin  what a rmnoo onyb@hgxru si !! +2
leaf_house  CTMA slkaashfbc on hsit igame +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.


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 +6  upvote downvote
submitted by d_holles(218)
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2%0 abimnul si YoHitREncP adn usaecs wgraind of ludfi tuo of hte itrseuntimt adn nito hte bo.old

mbni"ulA amn(Hu) 0%2 is enitcdida in het eenymegcr erenmattt fo hpmoviyoale wtih ro wuthiot ok.chs sIt sitnsefvfecee in erivnersg lmopeiyoavh eddnspe lgyerla npuo tsi tilybai ot dwra aiseittilntr dluif toin eth aocr.clntiui It si otsm feeiefcvt in asntptie ohw aer lelw haetd.dry Wenh olobd vulmeo iicdfet is hte ltesur fo re,mehhaorg aolptcmebi red boldo clels or lohwe lobod lhdsou be saermeidndit as iyulqck as psb"o.lsei

l/rm/u.mhw/itahsn2o/ptwrspdo.thlgabumu:0nm--.wc

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 +5  upvote downvote
submitted by assoplasty(108)
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coosicnanVorstit sceeersad obold wlof dna tush cseedersa orsathydtci .erpsersu sSeme erotcun ittivenui but I adh to olko hsti up aefrt I tgo it ,ngrwo o.to

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 +0  upvote downvote
submitted by bgreen27(6)
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naC emoneos hlpe a rhorbet ?uot My ntikihgn swa thta denricsea fidlu ni eth rtinlittieas dalse to rieeadncs mlp,hy os I hutogth yhte rewe ooknigl fro gnohmiste to uimssetal high ldtaueti rpaulmyno admee or ilearart paounlymr NT,H hhcwi I am yrtpte resu htob eald to myupnralo made.e hreWe did I go wgnor?

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ali_hassan  tish thgmi eb stpiud tub i otg it thirg hwti hsti oa el:taanenirecirs "orlm"an ldiuf .0%(9 laes)in in boyd = aescnire plymh .lofw ybelsaoltu no cmledia tocpcne ot it, tjus cliog oll +


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