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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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Fsrti tPion : yLphm somfr at hte yrlapiCal elelv of odobl esevsls ( as hsti is erewh ilfud smveo ni nda tou of sselesv anolg htwi teeamioltbs dan setnturin ) .

Teh uficonnt fo phyml si to rtnuer scxsee osetrpni and sitiatrtnile uidfl cabk to the lotmarbesod ( acllRe mpLyh ullavenyte sdnari ntio the gelar nsei)v

Sdecon Pntoi : We yam ircaense lmyph ierhte by gsnieranci 1. het etar at whihc we ormf it . .2 egDaesricn the aret fo garanide ( ei. - bcgtsuirton mlyhp vssesel )

oT naserice yhpml trnoomifa ew evah ot eirascen teh reat at hhciw ufild irtlfse otu of eth apeilliasrc . sihT nca be deno by elrinagt arSigltns ofsrec ni hte aylrlpcai

  • negsaiInrc dicrstaytoh sreerpsu
  • niDgceaers nccoOit peesursr

Gogni hhtruog eth optsino
ntO ipo A : ihtEednnol lliw aucse onscnvsioarttcoi of lournPmay teyrar iThs. si raapleylpicr iagnenm we liwl heav lses lo/odb ldufi tgegtin ot het lasreaiipcl - sreceaedd atsohrtcidy rrepesus dan eesaerddc mlyhp mtiofoanr
npoOit B : snrCcooiitnt fo ynuplmroa yratre gniaa
oOpnti C adn D : leda ot eth ilyhcospiog snserpoe fo ycxhopi ccvsniinoortosat
Optnoi E : srIecenda iotnocc usepsrer arcesesde het nuatmo fo duifl inmvgo out of ecaliiralps

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lovebug  wno I !ddnrnu~s~ta!e XTH :) +2
limberry  I vebelei uyo anme Otniop" :F sIdnraeec cicoton rresespu ssadceere eth oatmun of dliuf vmniog otu of crlliipae"sa aintdse of npOtio E, ?ghtri +3
weirdmed51  sYe . mbnluAi aka liolocd. +


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 +18  upvote downvote
submitted by hayayah(1212)
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yphmL olfw etar is lualusy .wol It si nfcelinued riylmirap by eth taer fo plhmy mnota.ifro oFr lmae,pxe if lbood pallcryai rreuepss is cesenaird by leartiar dloaaiiostvn or seuvno ooc,itnntircs the fowl aret of phmly easre.snci ,Aols het wofl arte si fedtefca by csemnproosi of mcstphlyia yb intcrotaonc fo gribeigonnh macrtseuulu and yb angeevti ittonrrhaacci eprsrues hie)nar(gt.b

statitnlIrie repusers s(o peruress in het ECF, hihcw oluwd nsciaeer fi vgine VI l)anise adn pmhly owfl rea pisvylotei rae.tled A lamsl erescani ni itinatirlets muovle tralgye icessrane sit er,erpsus romipnotg mpyhl wfol htat atcs ot roeesrt teh leintaitstri vlmoeu to mor.aln

emor on shti ctpoi: sKB/N/n5b../:iomg/3c.vhktitwownons4w8.h4bl/p

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linwanrun1357  oD ont dstnndreua teh ebihgrtan ci(oceh C nda )tb Daher in nad out ear e?feftrdin +
khanhluong  I o'dtn knwo if 'tsi rectcro ro ont tub how I aprhceodap C ;a&mp D saw atth ehyt btho caesu inrstonstacoocvi ni teh trlieersao abesceu( isht si het lgun wehre xipayoh ascseu octsorivti)nco,sna chhwi edersesca dyhostiract esrsrepu htorhug eht eiacplsilra dan vtaluyenel edcesaesr ylhpm o.lwf bMyea I pmleloeyct gto tshi nieuotsq thrgi rof ognrw onea,sr btu I tefl that ti kwros twih all fo eht sansrew. Fr o )F I swa nigihntk tath ti loduw sacue cisrdaene yrilaaclp oictcon reerussp hichw usasec more ufldi to go ntio het lyiplarca hant iont eth lyphm s.els.es.v 'eerHs a urip:ect asyop/dLwmo/hwpe10u.hc.me9altowpd/g1t.c/yin/2/:gmlpwasiemtbof/c0ptlhnt- +5


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 +8  upvote downvote
submitted by drdoom(1206)
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tVrciooctosinasn r(rnnawiog fo a )etub llwi usaec eth lfwo trae to neerscia orhtugh hatt b,eut cwihh aescseder tdwuoaailadrr/ sueesprr. heT sfetra a luidf evosm ogtrhhu a te,bu the lsse a”r“owtud fcoer it ere.tsx ihsT( is nkwon as eth teurnVi ecefft).

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hungrybox  tno sengie who htis si nevalret +9
sympathetikey  H'se hsoinwg ohw A am;p& B ear terccroni y@brnuxogh +7
nerdstewiegriffin  hwta a ormon obh@xurygn si !! +2
leaf_house  CMAT faclakshsb on hits geami +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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0%2 mlibnau si EitHnPRcoY nda cseaus ardnwig of fludi uto fo teh nmtiettursi nad otni eth dool.b

lnbui"mA aHnu(m) 0%2 si edtiiacnd in teh eeycenrgm etmtenart fo ipavheoolym tihw ro wtohuti .kshco tIs efvsistefncee ni sreervgni lyhaevpimoo sedpend rlyglea uopn tis iabltyi to awrd tirtniilteas fidlu niot hte ai.rucnlotic tI si smto ievfcetfe in netitasp ohw aer ellw hardte.yd Wnhe bdloo ulomev ediitcf si eth truels fo erhmoaehrg, mlatciobpe red bdolo lcsel ro hleow dbloo ulodsh be mensdrdaieti as ulkicyq as "psle.osib

.tm/ruw2tpchl//m0hutumso:spwdaob-nn.l-am.ihrg/w

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 +5  upvote downvote
submitted by assoplasty(108)
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ttrnniocsocoVsia dseerscea oblod fwlo nda suth ascdseree caohtitsydr .srerpesu emesS tconuer etuviiint ubt I adh ot kool tshi pu eatfr I tgo it ,wrogn to.o

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 +0  upvote downvote
submitted by bgreen27(6)
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Cna noeesmo hple a hteborr uto? My inhtnigk aws htat dacsieenr ldfui in teh esintirltati ldsae to ndeeairsc hlpy,m so I ohtthgu they rewe ngoliko orf mogesnith to eimsulsat hihg tdteuial ynamrpluo emdea ro atiraelr ymarplnuo HTN, wchih I ma eyttrp user ohbt adel to anolrypmu med.ae erehW did I go rwgno?

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ali_hassan  stih gimth eb dsuipt btu i got it irght wtih tsih ioen:ecatlis aarenr "roa"mnl ilfud (.%09 )ileans ni ybod = cnreasei hylpm olwf. oltayesblu no lemadic necopct ot ,it tsju cigol lol +


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