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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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Fsitr nPiot : yhpLm ofmrs ta eth apyriClla veell fo doolb ssseevl ( as sith si reehw ulfid sevom ni nad uto of esssvle olgna itwh mltieboates dan ietnrntus ) .

hTe ftoicnun fo pmhyl si ot terunr sescxe tenspior nda asintetltiri idlfu cbak to eth ooseadmtbrl ( laeRlc mLpyh venaeulylt sianrd oitn eht greal e)nisv

onScde inotP : We yam ecsaneir myhlp irehte yb nsecangiri 1. eth reta ta ihchw ew mfro it . .2 esenaDgrci the erta of naigreda ( ei. - usgrtcntiob phlym vslssee )

oT eacrnsei pmlhy fomarnito we vhae to rsienace teh tare at ihwch lufid flriest tuo of het icrilaslepa . sTih nac be oden yb raeingtl gtSilsanr rcfose in het liraclayp

  • gncIiarsne sitrdhaytoc supreesr
  • sgaecenriD iotOccn esurpesr

noGgi hutgrho eth siopont
opnOit A : dlihentnEo lwli cuesa sctsnooniaovcrit fo nlPaumyor etyrra Ti.sh si cryapleailrp aimngen ew lwil avhe slse bodlo/ dfiul egntigt to teh ecpasalriil - ecsadrdee tctrhydisoa sspereur dan eradeecsd mphyl ornoitfma
oiOtnp B : Cttiicnorosn fo rmoanylpu aetrry aniga
Op iton C and D : alde to hte slcihyioogp nrspeose of yochipx aortcsisotncnivo
tno piO E : Icsnadree cctooni prseeusr eaedrssce eth muatno fo idflu moinvg uto of eliaailsprc

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lovebug  won I urdse~t~an!dn! XHT ): +2
limberry  I eveible yuo amne o"ipnOt :F aerdncseI cnoiotc rerepsus radecssee teh umaotn fo fuldi mvgnio uot of iile"srpaalc aeditns fo ipotOn E, htig?r +3
weirdmed51  Yes . lAmbinu aak lo.cdloi +


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 +18  upvote downvote
submitted by hayayah(1212)
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yhLpm fwlo tare si yaululs w.lo tI si neednfclui milriypar by teh trae of mhlyp m.tofirano roF eeaxlmp, fi lobdo aiaylrcpl reesurps si cirsadnee by raaeltri voaliisdntao or suveon rsnot,iniocct the oflw aret fo mhypl cisa.enesr oslA, the wfol tare si fceadfet by cneosmrsopi of ihylmstcpa by taircotocnn fo genrbioihgn surtcumluea nad yb naiveget iaicrtcnrahto sepersur gaihr).ebt(n

Irsnltitetia erssrpue (so rseuresp ni the ,CFE iwhch wdoul ineraces if nvieg IV as)nlei adn myhlp wflo rea isoipevtly d.lareet A asmll srieneac in ilsattientir ovleum tyalerg scsniaree tis rsu,rsepe notgopmri lhmyp olwf taht tcsa ot eotsrre hte ensttiairlti euvoml to mnlr.ao

omre on hsit i:cotp o.3./wi4g4c:5bbn8spno/i/tmt/k.nww/Bshlo.vhNK

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linwanrun1357  Do nto nnadstrdeu eht ngaretbhi cehc(oi C dna re abt)Dh in nda out aer tnerfi?fde +
khanhluong  I ton'd wkon fi ts'i rotccre ro nto btu woh I ohcpapaedr C ;&pma D wsa hatt yeth btoh ecuas avriociconotstsn ni hte raoeeilsrt eaubc(se thsi si the ulgn ewreh iaophxy ceassu csoicntor)tso,niav hihwc assceerde catydohtsri prssreeu urogthh teh rlaaiplcesi dan nyellutvae ersaesced yhlmp o.fwl Mbaey I eplomycelt ogt hsit oesiuqtn thgir for gnrwo se,aorn btu I left taht it korsw twhi lal of the .aswsern Fro F) I saw niithngk ahtt ti wdluo ceaus adensceri iaplcrayl cionotc spusrree wihhc ausesc ermo dliuf to go nito het ailyrlpac anth ntoi eht yhplm ..esesv.sl eersH ' a ciup:ert Loti/cpgd-pt/empt/ehawn/a1icc/f.nwam/wmp/hh.oygb1lw:odom2lp0uel.s0yts9t +5


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 +8  upvote downvote
submitted by drdoom(1206)
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nniasoorocticVts (goanwnirr fo a bu)et wlil caeus hte lwof trae ot iescenra htgrhou tath te,bu chwih sedrcaese ialu/daroawdrt prs.sreeu eTh faesrt a fludi msoev rhgtohu a ue,tb hte ssle tur”“aowd refco ti rtsex.e (Tsih is wnnko as teh etrVuin etffec.)

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hungrybox  otn geeisn ohw hsit si retenvla +9
sympathetikey  s'eH gwsihon hwo A a;&pm B rea rtnocrice bgn@xyuhor +7
nerdstewiegriffin  atwh a mrono orbh@gxuny si !! +2
leaf_house  ATCM lkasacbfhs no isht ageim +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% imbnlua si RiYPtcnoHE nda casuse awngdir fo lfudi out fo teh teumintirts dna tnoi hte ldbo.o

un"lmiAb m)a(nuH 02% is idcdaneit ni teh yeergcnme tettaemrn of paylieovohm ihtw or uwotthi co.hsk tIs senfeecvetsfi ni rrvgeesni voyamoileph eesdndp ayllegr pnou ist ilaiytb to wrda itatslrnetii dfuil tnoi hte rc.toacliniu tI si otsm fcfetveie in eptinats hwo era llew d.hdyaetr hWen dolob lomeuv tiiedcf is hte slertu fo eraomh,gerh bmltcpiaeo red odolb slcle or hwleo loobd ouhlds eb ndiiaedmtser sa ucykqli as esbol.si"p

m.:t-w.-a/usuwhaugri/mnp/.ml2l0mhntwstdobrchop/

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 +5  upvote downvote
submitted by assoplasty(108)
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isinotsonccarVto seadceres odlob ofwl adn htsu seaserdec tridtayhcso ue.reprss esmSe ructone tnviuteii tbu I had to olko sith pu fetra I tog it wn,ogr oot.

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 +0  upvote downvote
submitted by bgreen27(6)
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anC osnmeoe ehpl a rerhbot u?to yM gnihinkt was hatt scnrdeiae fidlu in het tlserttaniii slead to ricanseed mp,lyh os I tuhohtg eyht reew kioglon rof mnestgohi to meaitluss gihh tltdueia apnouyrml meade or aareilrt rnlmaouyp TNH, ihwch I ma ytpter suer ohbt dlae ot yprnlmauo edae.m hrWee ddi I og nwgr?o

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ali_hassan  shti htmig be sdupit ubt i tog ti trihg thwi tsih r:eaclanisroeaient m"l"nora uidfl %0.(9 lnae)si in byod = aeceisrn phylm fl.wo beysluloat on claemdi occntpe ot ,ti tujs locgi oll +


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