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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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risFt Pniot : hLypm frsmo ta hte arlailCpy ellve of doobl selsves ( as tihs is reweh dflui msove in nad tuo of elsvses alnog tihw oteibetsmal dan nttsnuier ) .

ehT tncoiunf fo mhply si ot turnre ecsesx tospneir dan lnitsaietrti ldufi kabc to eht eromltsobad ( llacRe Lhpmy aelveulynt radnsi tnoi het glaer )eisvn

nocedS tnoPi : eW may renseiac yhlmp ihrete yb rcensaiing 1. het reta ta hchiw we mofr ti . 2. esgcDrniae the eatr fo ndegraia ( .ei - tnruoisbtgc yhlpm svlssee )

oT arisneec ymhlp riaofotmn we evha ot rsenacie hte taer at hwchi diulf fstirel tou of teh ipelalciars . Tihs anc be eond yb niargtel tnSrlgsai fecors ni eth llrapiacy

  • nIagsinrce tihadtcroys esuprrse
  • sneagreDci tocicnO ressruep

igGno horthug teh nstopio
t poOni A : Enhtleinod ilwl cueas scratncioosntivo fo Pmuyralon rtyrae hTs.i is cepplaairyrl megnnai we liwl ahev less oolb/d uifdl tgtgnei ot het aaicllprise - dseraeecd dryhaiotstc prsurees nad edcredsea hympl ifmotanor
pnitoO B : oncrtnsCtoii fo oapyunmrl eyrart naaig
tnOiop C and D : eald ot teh iogpischylo resensop of ipochyx vsiostnicocnrtao
Oo itnp E : ernIecsad cotocin prsreuse dcessraee het automn fo iludf mgniov uot of cailiaplesr

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lovebug  onw I aeudt~~srn!dn! XHT :) +2
limberry  I lieevbe you mnea p"tOoni F: eardnsceI niococt rpussere ecedsaers the nouatm of ilufd ogvimn tuo of r"esalcpiial tseandi fo nitopO ,E hg?rit +3
weirdmed51  Yse . iAublmn aak olcdlio. +


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 +18  upvote downvote
submitted by hayayah(1212)
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phLmy lfwo aret is ylsauul w.ol It is cufdneenli lyirmiarp by hte eart of phlym rtm.foiano orF axl,mpee fi olbdo acripalyl ersprsue si necarisde by aratrlei ioodtnlivsaa ro uevsno sictotorn,cni eht wofl reta of ymhlp se.nsairce s,loA teh owfl trae si effadcte by soenmorscpi fo tcpymalhsi yb taciontronc of hnerbingigo tmsuuulreac dna yb gtevaein tacriohtcnari urpresse .hegi)btnar(

itItaltrisne ueperssr (so rsreupes in het EF,C wchih dwoul enisrace fi vnige VI ilaes)n dna lymhp wlof rae ltsyveoipi dela.ter A llmsa rsecenia ni tattiriilesn vomelu arlgyte esisecanr its eeprusrs, iogmtornp lypmh fwol taht csat to eorrtse eth itrtitlisnea eolmvu to r.alnmo

ermo no sith opti:c iwlv.p.htiBt45bgosnsowh.34/.Kn:/k/wb8//oncNm

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linwanrun1357  Do ton tudandnesr eht aierhgtbn oceci(h C dna abrhteD) in dna tou rae frnftiede? +
khanhluong  I 'dnto knwo fi 'sit crecotr ro not tbu hwo I aarppocehd C &;pma D asw hatt tehy hotb saeuc sincoottsaincvor in het rlesreatoi u(sbceae shit is eht ulng ehrwe oihyapx cesaus ivotcs)tricnnoaso, hciwh csadresee dryotcatihs sesreurp troughh the rpclilieaas adn lvenulyaet eedracses yhlpm .wofl Myeab I mopyectlel gto tshi qsueiotn griht rof rnogw eanrso, but I tefl htat it skwor tihw all fo het nse.sarw oF r F) I swa hinkting atht ti dwoul escau seendraic iylcaprla cioctno erurspse hcwhi aseucs mroe fuild to og itno teh araplycil naht onti the plmhy svl.eess.. erH' es a cre:piut L/epmoo.t//t/swlai/c9npy2g:tec.bphgopt/pcw/l1aa.mlw1whune0fhmmsytdi0d-o +5


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 +8  upvote downvote
submitted by drdoom(1206)
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orctsctoiiVnasno r(iawngron fo a e)utb iwll seacu eht lfwo rtea to ierensac rhthgou that buet, ihhcw easeecrsd oaartd/riwdalu psrr.uese The faerts a lufid vomes uhogtrh a etub, the lsse oura“t”wd efcro it tsxeer. (shTi si oknnw sa the unritVe effcte).

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hungrybox  ton iegens ohw hits is eaevnltr +9
sympathetikey  'seH gnhoswi how A m&pa; B ear oncrreitc rxun@oybhg +7
nerdstewiegriffin  htaw a romno @hrongubyx is !! +2
leaf_house  AMTC sakslhbcfa on isht megia +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 nlimbua is YtnPioHcRE nad cuasse wrngiad fo uldfi tou fo eht surtnemtiit dan tnoi eth d.bloo

Abu"lnim m)nHu(a %02 si tdinicade ni het mngecerey teaetmnrt of lyhpeomiova tihw ro ohwiutt kchso. Its feesfnetecivs ni nivegsrre avhoploimey esdndep ryegall nuop ist liatbiy ot arwd sianlttireit iufdl iotn eht itau.ncirlco It si osmt citffveee ni tipeatsn how era llew rtah.yedd Wehn ooldb eovlmu iefdcit is hte ruelts fo ea,hmhergro mcioepbatl erd oodbl lescl ro owlhe odlbo hldsuo be rmdieatnedsi as kuicqly as sbeiopls."

hmlhow/tt/.nrs-wiwbg0ncsu:dm-//uatpohpl..2rmamu

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 +5  upvote downvote
submitted by assoplasty(108)
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ooorctnasitVnics ecsaesdre ldobo oflw adn uths aeesedrcs aorsdhytitc reruspe.s Sseem unortce uttenivii tbu I dah ot oklo iths up raetf I tog it r,ogwn .too

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 +0  upvote downvote
submitted by bgreen27(6)
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naC msoeeon hlpe a oterbhr o?tu My ingkithn was ahtt nrcasdiee fdilu ni eth eirlttsitnai aleds ot seancidre ylp,hm os I houhtgt hyet erew koinglo orf emnotsghi to miuestals ghhi utealtdi amonrlyup edema or trailrea rapynolum TH,N hchwi I am ttpyer rsue otbh aeld ot umplyanor eam.ed heerW ddi I og ?orngw

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ali_hassan  sthi thgim be tdpisu but i gto ti gthir whti hist eoactrinr:nesaaeil lnm"ro"a iufld .0%(9 insal)e in ydob = enceisra lphym .flwo sltayubloe on adcimel ontcpce to t,i ujst cgoli lol +


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