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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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sritF Ption : Lhypm sfomr at teh arlCypial elelv fo dbloo vsleses ( as hist is eehwr udfli esomv ni and out of sevlses nlago ihwt moebitatsel dan uinttensr ) .

Teh ionnutcf fo hpmly is to turenr eesxsc steiropn dan tsliiiattenr flidu abkc to eth tsrdomlaeob ( Rlalec mhyLp evtllanuey ndsria iont hte lagre siven)

eoSdnc Poitn : eW amy acsineer yphlm rheite by csngirniae .1 teh arte ta hicwh we rfmo ti . 2. neeaisrcgD eht erat fo dageiarn ( .ie - tciutosbgrn lypmh sseselv )

oT nacseeri hymlp mitaonrof we veah to necaesir eht aret at hhiwc fdilu rtslfie tou fo eth alpiicslrae . This nca eb odne yb rleating lrigSatns corfes ni eth prlilyaac

  • cgnsaneIir odhtratycis eruepssr
  • nseDariceg coicnOt eurrpess

gniGo gtuhohr the poisont
o ptiOn A : Elnnideoht will aecsu natrivocsocnsoit of auyrmnoPl treyar hisT. is layclpreiarp naeigmn we will eavh sesl /oolbd udfil ttgiegn to the liiealpscra - eaedsrecd yidhttarcos rserspue nad dascedere yphlm rafotinmo
tinOpo B : ontroitnisCc fo nypralmou aytrre inaga
Otipo n C nad D : lade to eht sclhgpiyoio pesserno of cxiphyo ntitssaovcnrcioo
npo iOt E : ceedInasr coctnio psrueesr csdreasee eth ouantm fo uilfd gvmino otu of iaialecrpsl

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lovebug  won I ~dnenust!r!ad~ XHT ): +2
limberry  I ivelebe ouy mean ino"tOp F: Icdeenars ocnoitc pusrseer reesdaecs teh omntua fo uifdl nmoigv tuo of "acpililsear istndae fo pinOto E, ?grtih +3
weirdmed51  esY . nAlibum kaa c.oildlo +


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 +18  upvote downvote
submitted by hayayah(1212)
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yhLmp olwf arte is asullyu .owl tI si lndfneeuci ylmripria by the trea fo mhlyp .rtnfomioa Fro eepamx,l if odlob ailalprcy rerpsseu is rsecnadei yb aitrarle ldsvonitoiaa ro soenuv ,cttrioonscin hte owfl aert fo mhply .arescinse Asol, the lfow erta is ctaeffde by ercossmopni of saycpmtlih yb atnrniotocc fo gnghbnroeii ealmrtuuusc and yb vntaeeig rcaitoirnhatc upeserrs ir.hnbaget()

iaIteirsnltt eusrrsep s(o esruesrp ni het ,ECF whihc oluwd seanirce if invge VI nse)lai nda hmypl lwof are yoieltispv rta.leed A lmasl ceaiensr ni rientsiailtt velomu rtealyg ecsenaris its rurpesse, pgomonrit pyhml flwo thta scta to oreerst hte tietsailntir emulov to orla.mn

emor no ihst :cpito k./.c5/t8BgwnN44K.wsm/isnbhlito./nwhboop:3/v

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linwanrun1357  oD ont undtansedr hte btrahineg cci(hoe C nad hab etDr) ni adn tou rea re?teindff +
khanhluong  I 'dton okwn fi 'sti rorccet ro ont btu hwo I phecraoadp C p;ma& D wsa atht heyt both cuaes roocsvncsoaititn ni hte eilrreatos aebuse(c isht is het gnlu rhewe yiahpxo uassce tvc,ss)rictiaonono iwhhc eseascred tthdroasyci suprrese tuhorhg teh irspalecila dan leutneaylv esecseard lmyhp wflo. ybaMe I lmelcypteo got tihs uioeqnst ightr rfo ogwrn eona,rs but I left thta it korws iwht lla of hte er.anssw o Fr F) I asw ngtinikh htta ti dlowu acues reicnsead capiyalrl oocnitc sseueprr hcihw ucaess oemr uilfd to go toin eth aapyclrli thna otin eht yhpml .lsss..vee e rH'se a terip:uc t:nmdcdwwbelpysftth/12L9ahhiil0o0a/t//ue-sppnw1c/.oc.lagw/ommopmgte./yp +5


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 +8  upvote downvote
submitted by drdoom(1206)
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ooscctrVstnnioai ognrn(awir fo a e)but lilw caesu hte oflw erat to ainescer hrhtogu ttha be,ut wihhc rcesaeesd lia/arurwaotdd ssu.rpeer ehT fasrte a lidfu esmov urhhgto a ,betu the less wraut”o“d roefc it .rextse hsT(i is nowkn as the etrniuV eefftc).

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hungrybox  nto nieesg woh isht si rnteeavl +9
sympathetikey  seH' wgshoin hwo A p;&ma B aer roernticc xbhyngo@ur +7
nerdstewiegriffin  ahtw a mrnoo hrgonu@xby si !! +2
leaf_house  TMCA asblsakfch no ihst 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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%02 ablmuin is iYtocnERHP nad casesu gdianrw of dilfu otu of eth smtiunrtiet adn toni teh obdl.o

ulb"niAm mHn(u)a %02 si inaetcdid in eth engeymecr tratteemn of moeiapvhyol twih ro uotitwh .chosk Ist sftenvsfeceei in vreergsni eyipahmolov edensdp lyrglae pnou sit ilaybit ot ward titineatislr lifdu nito het nuiocairlt.c It si mtso eifeefcvt in pniastte hwo era lwle dyte.rdha hneW loodb uovelm idfietc si hte rtleus fo armgho,rehe lbaimcotpe red lobod clles ro owehl lobod lshdou be aidrsedtmien as uykcilq as eobi".lssp

bt/gwap-ltmhaous2mwch.ro/hmrnupd.wt0mu.n/is-l/:

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 +5  upvote downvote
submitted by assoplasty(108)
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tcnisrVsiooconta eascesdre lbdoo olwf adn suht cseerseda aithocsrytd ps.rsereu Semse nueocrt iienitutv tbu I dha ot kloo htis up tfrae I tgo it ,grwon t.oo

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 +0  upvote downvote
submitted by bgreen27(6)
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Can semeono help a orbthre to?u yM nkiitnhg swa hatt dcnesriae fdlui ni eht srltaiteniti aseld to arsidceen pym,hl so I ghhttuo teyh eewr klogino for mgsenohti to alsmteusi ihgh ilatuted mryoulpan meeda or rtlreaai maonyurlp HTN, wcihh I am pyrtet ruse htbo dlea to roympnaul eaemd. eWrhe ddi I go ?grnow

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ali_hassan  tshi hmtgi eb pdistu ubt i otg it rihgt twhi sith c:l earsaaeitirneon "onmalr" ildfu 0.9%( is)elna in boyd = cneeiasr lymph f.lwo beyllsauto on ielcamd cpcento to ,ti tusj ioclg llo +


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