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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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rFsti ointP : phyLm rfsmo ta hte plCrayial vleel of blood sevesls ( sa ihts is ewerh uildf semvo in dna uto fo vsseels ngoal iwth eeaobsitltm adn sueirtntn ) .

heT toncifnu of pmhly si to rutner ecsxse ntriopes adn leirtsniatti liufd cabk to eth mbsotdeaolr ( Rlaelc Lmyhp tneeualvyl radsni toin eht lgaer ei)nvs

cnodSe otiPn : We may rcaeensi ylhmp ietehr by igaerncnis .1 eht etra at hwihc ew frmo ti . .2 rcnDaisgee the arte of eiandgra ( ie. - tigcobrntus myplh lsesevs )

To ecrsaein lmhyp foamnotir we vaeh ot incrseae the eatr at hihwc ldfiu lftseri uot fo teh lraicepsail . hisT can be oend by rtilgnea tanlsSigr erfsco ni teh rplcyiala

  • egnrinscIa otsdhicytra erpsrues
  • icnsagreeD cotciOn rrspeeus

nogiG orghthu the poonsti
Oopn it A : dihntoenlE liwl uaesc ccitsnovsnoairto of uaomrPynl ryerat sT.ih si rclearyappli nnmgaie we lilw vaeh lsse dloo/b lfiud gtinget ot eht asiialcrepl - cseeaerdd athicosrydt eseruprs and eredadcse ylmph trianoomf
tnpioO B : stnnictoirCo of polmuaryn rtyaer aaing
Ot ipon C dan D : elad to het icpsihygool eosrepns of oxhpyci aooitivcntscnsor
onOtip E : drIenesac cotoicn rsupsere cedsersae eht omuant fo fludi igomnv tuo fo piiallresac

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lovebug  onw I !nadr!~nsedtu~ THX ): +2
limberry  I lbeveie ouy eanm "oOnitp :F eedrIscan otincoc sreepurs rceaeessd the mntoau of udifl govinm tou of ercas"llpiia itnesda fo tiOpno E, ihr?tg +3
weirdmed51  Yse . nulbAim aka oodi.lcl +


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 +18  upvote downvote
submitted by hayayah(1212)
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Lmyph owlf arte is ulluasy .owl It is encldufien aiymrrpil yb eht trea fo yhlmp faomtrnio. orF pae,xmle fi odlbo aacriplly pessreur is ineecarsd yb airlarte iaalnivdosot or uenosv nitsootrn,cic hte lwfo aetr fo mlphy sns.eraice A,slo eht lofw trae is eeftcfda yb osiepsmcorn of chsapyimtl by nocncoirtat of nrnibihogge mulcesuurat dna by iaevtgne ritcrthanoica prseuers hib(neg)ar.t

iIislntteatr seupsrer s(o sresuerp ni het CFE, iwchh owlud ceinsrea if gveni IV slneia) dan ymlph flwo era ovspyiilet a.edlter A lasml eernsaic in erlstitaitni euolmv taeygrl eesnsraci tis rsepu,res rmptingoo pymhl wflo thta tcsa ot esorter hte litieitrntas mloveu ot .anroml

more no sthi i:topc n8otn4iswlNK5stwm//bv4kgpw.nhi././ob/3B.:hco

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linwanrun1357  Do ont dnantrusde eth aneibhrgt eich(co C dna Dr)t eabh in and otu era r?idfnefet +
khanhluong  I ndot' nwok if t'si ctroecr or ont utb woh I ocapdraphe C ;m&ap D swa that thye thbo cuaes aitsvcoocnitrson ni hte rliestoare sue(ceba sith is eth ugln rhwee aophxyi eascus noinr)tsstviaco,co ciwhh desaersce iatythordcs reresups ghourth hte arpliicelas dan enltyevlau rssdaecee mylph .wolf yMbae I yetolpeclm gto isht qoutnise hrtgi rof rgnow asnr,eo tbu I tlef taht it wksro hwit all of eth sraewn.s o rF F) I aws iinghktn htat it odlwu seuac renaidecs cyipaarll ocotinc rssreepu chiwh eussac orme dlifu to go tion het laricyalp naht noti het hlpym .es.sesv.l erHse' a tpi:ceur a:apn2pa/m.pwdwn1/gmgp-0ywlil/phlhmotts/o/emdcb9oes/1ewfyticu.0c.t/tLoh +5


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 +8  upvote downvote
submitted by drdoom(1206)
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Vonocacitisortsn (rwianognr fo a ub)et ilwl seauc eth wofl taer ot eienascr hgurtoh atth bute, iwhhc aceessedr d/talraiuwaord ersprus.e heT tafrse a duilf osemv hturogh a ,eubt eht less atr”uw“od rcoef ti .tesrex ihs(T si konnw sa teh inVertu efcfet).

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hungrybox  nto seegni how htis is arlenvte +9
sympathetikey  e'sH iwgnhso owh A mpa;& B era oicrrcnte rubhg@xnoy +7
nerdstewiegriffin  twah a nrmoo n@oghyuxrb si !! +2
leaf_house  AMTC hcaskalbsf on tshi geima +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 bmnuali si nRYEticoPH dna scasue ndiagrw of fdlui otu of teh tesrmttiniu nda toin het .bldoo

Aiub"lmn nmaH)u( %02 si dadetinci in hte genmceyre rttatmnee fo mvyelphaoio wiht or huwtoti ocsk.h sIt eesveeistcnff in vgierrnse vmelopiyhao pesdned egyllar onpu tis ylabtii ot wadr aslerittitni dlufi tion het rliuccatoi.n tI si tsom eceevtfif in iepantst who ear lewl e.dhyadrt eWhn odbol vlmeuo ediitcf si eht uselrt of grheemho,ra ietpbaoclm erd lodob llsce ro lweho obold sodhul eb msniedatredi as ckyiqlu as bl"os.spie

2duwhobc0rhhmnwuttla/a/mimu.prmw-gso-/.n/s.plt:

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 +5  upvote downvote
submitted by assoplasty(108)
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anitoosnistorVcc rescdeesa olbod lfwo and usht sedsraece attyicsodrh esrer.pus eesmS ctouren tevnitiui utb I dha to olok htis pu rtaef I otg ti ,wnorg ot.o

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 +0  upvote downvote
submitted by bgreen27(6)
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aCn smoeone hepl a brroeth uot? yM inkihgtn wsa atht dreiesnac udlfi in the eirisltttain ldesa to rcediasne hm,ylp os I htuogth yeht reew lkogoni rof ihtsgonme ot aelusmits hihg luidttea nyarmlpou demea ro taarriel mrpuoynla N,TH cihwh I ma pttyre ures tbho dael ot yplaounrm .edmea eWreh idd I og rwo?gn

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ali_hassan  shti imtgh be dpstiu but i ogt ti ghrit hwti itsh rrne:tiienacol saae m"orn"la uldif .0%(9 s)nliae ni odyb = esernaic ymhlp lof.w slbeatuloy on edicmal centcpo to i,t sujt oiclg lol +


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