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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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iFtsr ntiPo : hyLpm rmofs ta teh iaCalpylr lvele of lodob sevsles ( sa thsi is eerwh fluid veoms ni dan out fo esesslv lonag hitw mosttlaeebi nad tiuensrtn ) .

Teh iuctonnf of hlmyp is ot rnurte esecxs iensortp dan srtinleatiti fldiu acbk to the ltroadesbmo ( lRclea Lyphm neutalylve ridnas onit hte lrage )nvsei

necSdo niPto : We may ecearisn pymlh terhie yb irnsneigca 1. eht ater ta chihw we mfor it . .2 Dgeeianscr teh atre of eniagadr ( ei. - coigtturnsb ylhpm esslesv )

To ecraensi ymlph ofioatmrn ew heav ot neacrsie the reat ta hcihw diulf lfserit uto of teh crisalpiale . Tihs acn eb oedn yb entgarli girSlastn seorfc ni the aprallcyi

  • nieIcngsar ittdahosycr perrsues
  • rgDnaisece cocntOi uesrersp

oignG urgohth eht nosipot
Oonp ti A : Enolndhite llwi aecsu oioisvaosnctnrtc fo uyalPnmro yaerrt .hTsi is rcrlyeapapli eianmgn ew liwl heva ssle /ooldb idufl tgientg to eht iicalsaplre - esdadcere hacsyttodri rersseup dna adecdeesr lphmy aftminroo
ptiOno B : oiCrntctinso of rmuyalpno treary aniga
ioOp nt C nda D : elad ot hte hyiciosgplo oseernsp fo cohpyix aorionictvsoctns
tpOo in E : aernesIcd tcnocoi spesrrue esrdceaes eht atmuno of fdliu ingomv tuo of ipcaisrella

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lovebug  won I d~!rnasnd~uet! HTX :) +2
limberry  I beeviel yuo mean tioOp"n :F naseercdI ootcnic sreesurp seraedesc eht muaotn fo fudil vingom tuo of a"lripicasel aietsdn of Otpino ,E ghr?it +3
weirdmed51  seY . ibnluAm aak olldi.co +


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 +18  upvote downvote
submitted by hayayah(1212)
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ymhpL lfow raet si lyusual wl.o tI is iflnudecen iyliamrrp yb eht aert of yplmh ami.ntrfoo orF e,plmaex fi oldob llacypiar rreussep is cneiaesrd by lrrtaeia tiaoalnvsiod ro uveson soorincic,ntt eth flow etar fo mlyph sineasc.re slA,o the lofw rtae si tfaeedcf by romipnseosc of tmclpasyhi yb ioctotcrnna fo ngehgiorinb rluetucuasm dna by neeavgit cirrtcaahonti rsreseup han(be).irtg

ttItrsliaeni rspseeur (os reupsres in eht ,FEC chwhi douwl sciaeern fi envgi VI nl)eais and mhply olwf rea ytiievsopl .tlderae A llmsa reeansci in nirliesatitt emovlu elrgyta ssaerceni its r,sreueps rtmngpoio lmpyh wflo taht csta to etrrose eth nittltiaeris elvumo ot olmn.ra

eorm no itsh tic:po mhbi/psswwo4oo.4.tkKwng//Bi/hc58blntvn.N3:./

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linwanrun1357  Do otn ddaunntesr the nabghreti cocihe( C adn Dt brh)ea ni dan uot rea ferftnid?e +
khanhluong  I 'dtno kwon fi is't octrrce or nto utb hwo I daceppohar C a∓ D was thta ythe btoh ecusa snioivctctsoonra in eht rotaleires seb(aecu htsi is the lgnu wreeh ahxopyi asuecs ,taoissoitocc)nnrv chihw cseadeesr oaitdcsthyr uerpsser ugrohht hte sceilaaiplr dna eelatvuyln rcedaeess lphym fol.w yeMba I ylpetmeocl gto htsi utenqios hrgit ofr rwnog ornase, tbu I felt thta it rsowk twhi lla of teh wes.rnsa or F F) I aws gktinnih hatt it wloud useca dnseeiacr rpaiallyc coincot espserru whhic ssaecu mero ilfud ot og toin the palayrcli than iton the mhylp evel.s.s.s r'see H a tp:icuer h.lfmha:pap/b9Leteds/0wt/wtg1sm.gwclyipdpy/ln/ctt.woome2-pinm/0uac1oo/h +5


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 +8  upvote downvote
submitted by drdoom(1206)
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oactocnoitisVrns orng(niwar of a )bteu lilw ausce hte lwof rate ot eesrcnai rhthugo thta ,ebtu which eesscaerd aardtdrw/ulaoi .urrsseep ehT teafrs a iulfd osvme hrguhot a ,utbe eht elss td”ro“wua eocfr it tees.rx hisT( is wknon sa teh uteVirn efceft).

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hungrybox  not gneise owh itsh si rlavtene +9
sympathetikey  se'H sgoihnw woh A ;&mpa B aer ecnrotcri @uxrohngby +7
nerdstewiegriffin  hwta a roonm nguorybx@h is !! +2
leaf_house  ATCM ahsablskfc no tshi amgie +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 mlbauin is YtiHnPoEcR and sucase grwadin fo uidfl out fo eht semruttitin dna otni eht ld.obo

buni"lmA Hmn)au( 2%0 si nidedctia ni teh gyrecemne etttmaner of apioelovmhy hwit ro hoitutw ochks. Its eecsvnefetfsi in gsneerrvi oielmypaohv dnseepd ellrgya npou tsi tabylii ot draw tnileitsitar fiuld oitn teh ciairnuloc.t It is stmo iecfefvte ni ipetnsta how rae lwel h.erddyat nehW ldoob vleumo cifteid si teh uelrts fo ehmhgea,ror matepcolib red bdool llesc ro eowlh odlbo ulhods eb itandmsieerd as qkyciul sa sileo".pbs

glba/usmitmln.p.os-rc-uw/wth:htpd2mm./u/a0wnroh

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 +5  upvote downvote
submitted by assoplasty(108)
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nVorsianicotosct rsaseecde oodlb fwlo dna htus sedraeecs aroydhctits ru.sreesp eSmse curneto euitvtiin btu I ahd ot okol tihs pu eftar I ogt it orw,gn ot.o

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 +0  upvote downvote
submitted by bgreen27(6)
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aCn eoneosm lphe a oberhrt uot? My ihknngit asw atht dnaiserce iludf ni teh ttinsiateril esald ot nriedcaes lmh,yp os I guththo yeht ewre oloking ofr ngomtiehs to sautielms ghhi letautdi uplomryna deema or eriatral ryomlpanu ,HNT hicwh I ma tytper eurs tohb ldea to yulrnapom eae.md reheW ddi I og ?gnrow

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ali_hassan  sthi gthmi be udstpi btu i gto ti tgrih with hits necn:iliertaoaraes l"m"rano dfiul %0(.9 ians)le in bdyo = ersianec pyhml flo.w ablsleotuy no alcmide oeptncc to t,i sjtu colgi llo +


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