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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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rstiF Piont : hpmLy rmsfo at teh lpyraClia veell fo lobdo ssveesl ( as hist si ehrwe iufld msveo ni dan uto of evlssse oangl hiwt meaiselttob and urstntein ) .

ehT tfcuinon of lhmyp si to teurrn sxesce epostrin and ttliraentsii ulfid bcak to het msoaertldob ( lalRce hLymp aeulyvtnel rsadin iont hte lager vsien)

oSedcn Point : We mya asecinre ypmlh ieterh yb cgienansri 1. eth ater ta chihw we form ti . .2 encasrgDie eht rtea fo nraeidag ( i.e - gibntrsuotc lmhyp vsseesl )

oT ncsiaeer pyhlm nroitmoaf ew evah ot ncreseia hte atre ta icwhh ldfui eslrift uot fo het aelasciprli . Tihs nac eb oend by ltgnaire lagnsrSti efcrso in eth ryaipclal

  • acniesrgIn hctriatdosy eurpsres
  • iensegcrDa nOtocci repusesr

oignG ugthorh teh pointso
noOipt A : ldhtnioenE lwli uecsa iorconvsitcotnas fo rPomnaluy ryreta Tis.h is ipyaearlclrp mgnaeni we ilwl aveh ssle o/ldob fidul eitgngt to eht ailsilrcpea - cdesderea stahtcrdoyi rreespus adn saderecde lmhyp montorifa
poitOn B : ictniosotnCr of moyrpluan arryet aigna
tip nOo C and D : edla to eht oyslipgchio essprone fo yoiphxc csntoctsnvioriao
Ooip nt E : nredascIe tioncoc pessurer esacedres het tnuamo of duifl voming tou fo rcsalpaleii

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lovebug  own I dndars!~t!n~ue THX ): +2
limberry  I elveebi uyo mane itnoO"p :F cedaIersn tiooccn esrrpseu asdreeesc hte oantum of fildu vnomig tuo of cil"lrespiaa ntesiad of Otoinp E, t?rhig +3
weirdmed51  eYs . bimnlAu kaa lc.doilo +



 +18  upvote downvote
submitted by hayayah(1212)
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mhLpy fwol trae is uauslyl olw. tI is fuilcdeenn lryparmii yb het ater of plymh irmf.notao orF xela,pem fi oodbl irycaallp reussrpe si nsdiercae by reaitral tnlovosiidaa ro ousenv irco,nctntosi het flow trea of yphlm .isecanrse olsA, the olfw reta is fcdaetef yb psicseonmro fo yptliscahm by ootcrntianc fo ehinrgginbo ltusmucuera dan by eeagvnit ochnitraraict resuersp bage.rn)(tih

snaItrtlitei srsuepre (so upesrrse ni hte ,CFE hihwc udlwo aesicenr if neivg VI ea)lnis nda hplmy ofwl ear yoiltpseiv e.eatdrl A lsaml cineaers in ttelaisitrin olvmeu egyatlr rncaeises its eu,spersr pogirmton lmpyh lfwo hatt acst ot esreotr the tiariilnetts oemvul to nl.maor

moer no shit cp:iot N/oi/pvB34/w/lsbs5i4tnntk.hhmc.8owKn.wg:.o/b

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linwanrun1357  Do ont duandsentr the rabnietgh oi(hcec C dna eD) trabh in dan otu rea ietedr?fnf +
khanhluong  I nt'od konw if i'st errtcco ro nto tub how I papdehocra C ;a&pm D swa hatt teyh obht csaue voictonnitcsoras ni het irlrsoteea beauce(s ihts is teh nlgu ewreh yaoipxh sasuce sostorvc,ocn)inait whhci esrsdeaec odsithcyrta reserpsu hrguhot teh iarlcpaseli nda nuayllteve ecaseedsr plhmy wofl. eaybM I lmeeypclto tgo hsti uotqneis gthir ofr wrogn aeonr,s tub I etfl htat ti wksro hwti lal of hte ss.enawr rFo )F I aws ngniitkh htta ti luwod uesca dscenirea pliracayl cocinto eprssreu chwhi useacs roem uilfd ot og iont het pcilaraly anth tino eth hmlyp .ssl.eve.s ees r'H a i:urectp pepgbpuawo.s/alstphh-:nfnylt0oeLiodcy/mdt/19ew.0m/pgtcwi1.alh//owmcm2/t +5



 +8  upvote downvote
submitted by drdoom(1206)
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aitrnocooistnscV wioranrg(n of a u)ebt wlil cuaes eth owlf aret ot iersenca hrutohg atht ebtu, hwihc ecssdaere ur/dwrioaldtaa urpeessr. ehT erafts a ifldu msveo othurhg a teb,u eth essl r”w“oadut crfeo ti tesx.er ishT( is kwnno as the teniuVr tfcefe).

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hungrybox  not ngeesi hwo shti si raeveltn +9
sympathetikey  e'Hs isgwnho who A m&;ap B rae conriectr rgbh@uyonx +7
nerdstewiegriffin  htwa a nromo nugox@ybhr si !! +2
leaf_house  CMTA sbchaslfak on hsit iamge +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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02% labmniu is RYHPtniocE nda ssacue adriwng fo ifuld out fo eth irtemntuits and oint teh lbod.o

bum"lniA Hu)anm( %20 si idtcniead in eht neymeegrc rteaemttn fo poiomalhyev ihtw or huoiwtt .kcsho tsI esstnveffeeci in nriverges aelvyoipmoh ddeespn eagrlyl opnu sit ybailti ot ardw ltretnstiiia uilfd itno eht aui.tiorccnl tI si osmt eftvfecei ni tpaneits owh aer lelw ayhdet.rd nehW ldboo lmevou ideiftc si hte rletus fo ohgrear,mhe tlceipamob rde lbdoo llsce ro whoel olodb ulhsdo eb rienietddams as kuqcily sa sp.sbe"loi

b-/-tgmiprwhn:moartmh/m//dwso.p.n.ulh0wtucausl2

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 +5  upvote downvote
submitted by assoplasty(108)
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trnisntcaViosoco eercssaed bodlo lowf adn suth cderseaes tdycrisoath pss.ueerr mSsee rnceotu itivenuti btu I dha to oklo htis pu traef I tgo ti gw,onr .oot

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 +0  upvote downvote
submitted by bgreen27(6)
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aCn eomesno elhp a rrthbeo ou?t My hitinngk wsa htat cierensad idulf ni het teatrniitsli sadel ot nsrcadeie lyhp,m so I hhoutgt hyet rewe ikngloo rfo tmnegshoi to suimlaset hhig idleuatt plmraynuo edeam or lrieaart uyramnopl ,HTN ichhw I ma rpttey ersu tobh dale ot yanompulr m.aede Wreeh did I og no?rwg

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ali_hassan  htsi mihgt be dstpiu ubt i ogt it ghitr twhi stih reeni cale:srontaai r""maoln lufdi %09(. nea)lsi in obdy = eaesicnr phlmy lof.w esblyaotul no mdliace cconpte to it, ujts ilgoc oll +



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