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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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istFr inPto : mhLpy omsrf at eht aalyCplri elelv fo dloob ssveels ( as this is wreeh fluid smoev in and tou of ssveesl olang htiw tbeiesamtol adn rsietutnn ) .

Teh tnoicnuf fo mhlpy si ot utnerr scsexe irseoptn dna tinasettrili fudli ackb to hte abordlmotes ( aelclR yLmph tyuevnella sarnid onti hte laerg i)nsve

cnodSe tiPno : eW mya eenrsica hmpyl iterhe yb neinigcsra .1 hte taer at whihc ew form it . .2 egreasnDic het tera fo airgaden ( .ie - ogstrnbiutc mpylh lssevse )

oT aicsnere plyhm fnaoorimt we hvae to isnaecer teh trae at chwih ufdli etlirsf otu fo eht illaiarcspe . Tshi cna be edno yb rtalnieg rtgsanSil srcfeo in eht acryllaip

  • isnarIceng tosaidcrtyh userrsep
  • Dnrcseaegi tnocciO upeesrrs

nogiG troughh the siontpo
O oitpn A : htEdenloin illw eusca tsciorotcovnsnia fo rnloPmuay rrtyea ih.Ts is ypirecllaarp mingean ew wlil vahe essl /dobol fiuld iettggn to teh ciasieaprll - ercesadde otyatcdsrih eusesprr and secaeerdd yplhm aonofmrit
pionOt B : oinCtnsirotc of ropynmual atyrre aigna
ito nOp C nad D : ldea to teh osylighpcoi reosepsn of cpxyhoi csnnrvostotoiica
ipoO tn E : enrascedI nicotoc prsseuer earessced eth uatomn fo ulidf mvniog otu of alpsiaecrli

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lovebug  now I !nndutade!~rs~ HTX :) +2
limberry  I vlbeeie uoy enma opt"iOn F: cenIdraes cocoint seruspre eadeecsrs the uotnam fo luidf vimogn tou of aipsrcali"el ntsidea fo ipnOot ,E i?htgr +3
weirdmed51  eYs . ulAnbmi aak lcioold. +



 +18  upvote downvote
submitted by hayayah(1212)
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hmypL olfw tera si lsuayul wl.o It is nlnfeiecdu riarylpim yb het eatr of lhmyp .aiotornmf Fro emlexp,a if obdlo pryalalic reuepssr is ereinsdca yb rtraelai ntadisaoivlo ro osenuv rnoit,cotcnis eht wlfo trea fo mpylh eani.sescr lsoA, eht fwol taer si dfaecetf yb sncmoreipso fo iyatshcmpl by totnanioccr of goingrhenib saurtluemcu and by tiveaneg icnrthroitcaa rsuseepr n.r(e)bahgti

tsirnIetliat erpsures o(s russrepe in het E,CF whcih dolwu cinreesa if niveg IV anlse)i nad hmlpy flow ear eylvtopiis .teralde A malsl nraeices in iielsitttnar mvuole ayretgl sancisere tsi esur,esrp mnpirogto hylpm ofwl ahtt stac ot roreest eht nlettisraiit vmueol ot mlor.an

meor on htsi op:tic :/BK.si/lpk4.th/hwmbow/nc.ob.N4/5tvown3in8sg

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linwanrun1357  oD ton atnddurens eht rntigaheb eocih(c C dna )et brDah ni and uto rea rtdneefi?f +
khanhluong  I 'ntdo wnko if ist' orrcect ro ton ubt woh I cdparhepao C &pma; D saw tath yhte hbto ecuas oiviorssanctcotn in hte ltoeesrair ecsa(ueb tshi is eth nulg ewhre payohxi ucases osnvtiat)ccnori,os chwhi eassceerd srohaydtitc serusper hruhogt the scilaleiarp adn layunevtle rdsaecese hympl .folw yaebM I oeytlcemlp got hsit seqinout itghr orf onwrg onr,sae btu I ltfe atht ti wrkso whit all of het aesnwsr. rFo F) I aws ntghikni htat ti wdlou uaces daeenirsc plraaycil tnccooi erpseusr wihch caseus roem ludfi to og onit het aiylcaprl tnah toni eht mylph .sse.svl.e 'se eHr a etcupi:r bpwwhg:y.elgma/f29pmto.1e/tminyplwn/i-em//0o0Lhcw.ht/da/coosaltpcsudt1p +5



 +8  upvote downvote
submitted by drdoom(1206)
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cisttonocoVnsria w(ngioarrn fo a te)bu lwil cseua hte oflw raet to iancerse hrhgtuo htat u,tbe wchhi ssceadeer i/adoutaldrraw eu.rseprs hTe tasfre a dulfi esomv trhohgu a t,ueb eht slse ”tadwuor“ coefr ti xseert. s(hTi si ownnk sa eth nreituV tffece).

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hungrybox  otn sineeg woh htsi si tralenve +9
sympathetikey  'Hes nihwogs woh A ap;&m B aer ncritcroe o@xrubnhyg +7
nerdstewiegriffin  hatw a omrno xnrgob@huy si !! +2
leaf_house  CAMT scasakhflb on tsih agiem +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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%20 mabluin si tYREHcnoPi dan aucess nidrgwa of fdlui tou of hte uenrtttsmii dan onit teh ldob.o

lAibn"um Han)um( %20 is dadiiectn in the yecenrmge taneetrmt fo opialeoyhmv twih ro oitwuht ch.osk tsI vnfieeeetcsfs ni grverenis hvmapoleoyi dnepdes elrygal opnu sti iyblait to dwar letiiatsrnit liufd onti het .acnoticrliu tI si toms eeceiftvf ni neiatspt hwo ear wlle eyddrt.ah nehW obldo lumevo ieficdt si the resltu of ra,hgohemre epobtmical der olobd lsecl or lohew odlob sulodh eb insrmeitdead sa lqkicuy as lspi."oesb

mt.//suin/po-shht0poun.m.alwwl-rcatwmbd2g/:mrhu

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 +5  upvote downvote
submitted by assoplasty(108)
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aictcsninoVoostr erssceeda odblo lwfo and suht deaesersc oahtdcrysit srserpu.e Semse cetnour itneuiivt but I adh to ookl iths up raeft I otg ti wrgn,o oto.

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 +0  upvote downvote
submitted by bgreen27(6)
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anC nomeeos hple a otrhrbe to?u yM hinkting was atth eirsdcnea dflui in the ttiilsetrina asdel ot eecadrnsi ,pylmh os I otuhtgh etyh weer onglkio orf mgonheist ot eituamlss high luittdea oyulpmrna edmea ro lrieaart ylaompnru ,NHT whihc I am prtyet erus htbo aeld to myornlupa e.edma hWere idd I go grwon?

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ali_hassan  shti hitgm eb pitsud but i otg it ighrt wiht ihst :enlaiaeor ascirtne nora"l"m lfdui 0%(.9 li)asne ni oybd = eirsecan lyphm l.fow olalyesutb no iemcdal encptoc ot it, utjs ioclg oll +



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