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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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itFrs nitoP : mhLyp mrfos ta the yCpairlla eelvl of odbol eseslvs ( as hsti is weerh udfil moevs in nad uto of elsvses lanog wtih abeesmttloi dna uttrnensi ) .

heT ufnitnoc fo lpmyh is to ertrun xesesc senproit nda siitltrteani ifuld kbca ot eth esrotmbdaol ( aleRlc Lyhpm neteullvay aisnrd iont the ergal n)isve

oceSnd tiPno : eW may naeciers hpmyl treieh by rienagcsin 1. het rate ta chwhi we form it . .2 iernsDgcae eth ater of ndaareig ( .ei - nsotiburtcg ylhpm vlssees )

To scienera lyhpm firmaonot ew aveh ot creiesna hte eatr ta chhiw dfuli ritfsle uto fo teh scraileapil . shiT nac eb node yb gialnetr trslngaSi ocsfer ni het iyapclalr

  • isrneIacgn coysraitdht rpurssee
  • naerDsegic oniOtcc srsepreu

ioGgn tuhohgr het psnooti
pinoOt A : tEoinnhled illw cusae itrstioanocvoscn of namPyoulr trreya h.iTs is lpperaaicylr inangem we wlil evha sesl ob/odl fldui igttgen ot eth eclrlaipais - ededcsrea rtisatodcyh rseseurp dna sreddaeec phylm oamnotirf
ontOpi B : iroocnintCts of ormnuypal ytrrae gaian
i pOton C adn D : alde ot the iiyohlospgc esprsneo of hoyicxp irotctionocasnsv
iOopn t E : eecdrInsa cioctno purserse decraeses eht unaotm fo uldfi mnogiv otu fo illaeipracs

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lovebug  onw I dn~rtd!~a!nesu HTX ): +2
limberry  I evebeil you amne pionOt" F: redIscena ocntoci ursepesr esrceased the tanuom fo ilufd moignv uot of iaplrisl"cae tsaeind fo piOnot ,E rihg?t +3
weirdmed51  Yes . uAlinbm kaa oloidlc. +


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 +18  upvote downvote
submitted by hayayah(1212)
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hLymp wofl tera si llsayuu lwo. It si leedinfunc ialrmpyir by eth eatr fo pmhly taofnor.im oFr mpxe,ale if olodb aicplrayl srspeeur is dainesrce yb traleira otiavaoisdln or vuosne onsirnioctt,c teh wflo erat fo yhlmp .escirsnae sAlo, het wolf eatr si fcetedfa by onssiropmce of aicltyphms yb oacnotrntic fo enrbhongiig tlsmruucaeu dan by negevait taiicranrtoch euersprs he.a)bignrt(

lstiitnerIta usrpseer o(s urrsepse in het ,EFC wchhi uoldw iaesrenc fi ngevi IV elsnai) and hypml flwo era syvoltiiep lter.aed A alslm ceniaesr ni tilatntiries elmvou ygletra ssincaeer ist reu,esrsp minorpgot hlypm owlf tath scat to eoresrt hte ariitnlestit voeuml ot n.romla

rmoe no itsh io:ctp n.k5wtcgK/nmv/4wwl/o.3s.bo/h4tbpNi:B8hi/n.so

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linwanrun1357  oD tno dearudnstn the naebgirth ohc(cie C dna brtea h)D ni and otu era enef?rdtif +
khanhluong  I 'ndto wkno fi 'tis orcecrt or ont ubt who I oapcpedahr C pma;& D asw thta eyth tohb acuse nincisatoocrostv in teh tielraroes (aecesub hits is eht nulg erhwe yhxaipo eascus icvc,ioo)sattrnson wichh essrdecae tdiatrochys psreseur htourhg eth eripsllicaa dna ueetlvyanl asederces pmhyl .lwof Meyba I ytmoclepel tog ihst sutniqeo rgith ofr owgnr roasn,e utb I letf ttha it rwsok whti lla of the sw.nesar r oF F) I asw hnntiikg htta it dlwuo cusae isencerda cpylriala ctcioon eprrsesu ichwh cauess orem luifd ot og iton hte irlapylac tanh ntoi eth lpyhm .evsl..ess se'eHr a c:tuprie -mnaiolmy.aw0tdpeL/1t:ss.ehbhpg9o/tupi1m.mlwnwp/f/2hpgoa//lcty0cot/ecdw +5


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 +8  upvote downvote
submitted by drdoom(1206)
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arcsVtiooncnosti nwirg(onar of a tb)eu will caseu eth lofw ater ot sraencie grhouth taht uteb, hwchi rcaeeesds rrwtloduad/aai eursper.s hTe tfesar a udfli evsom hgrhuto a buet, eth ssel dtw”“uoar ferco ti st.xere sihT( is wkonn sa teh eitrVun fefcet.)

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hungrybox  nto nsgeei ohw tsih si atnrelve +9
sympathetikey  'Hes swgniho hwo A pa&m; B rea ecnritocr oruxhgnb@y +7
nerdstewiegriffin  hatw a normo obgrhuy@nx is !! +2
leaf_house  MACT shfcskbaal no htsi igeam +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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20% mbiunla is REYnHioPct nad sscuae graniwd fo dlufi uto of het tuenirmtsit adn oint the dobo.l

unliAb"m (muaH)n 0%2 is acidnetdi ni het rceeenygm tenetmrat fo oemaplivyho whit or tohuwit kcsoh. tIs ceetsfsienfev in iervrnges apmoihoyelv spedend grllyae ounp sit ybiitla to wdar staeilrttnii iuldf nito het iotcuncali.r It is tsom ecfevitfe in etnistap owh are elwl hertad.dy ehnW ldboo elmuvo cdetfii is eth reulst fo rhorhmea,ge aotblecipm edr bolod elscl or wlohe oobld hluods eb tdesiamerind as luycikq sa po.eiss"lb

sahrlpmh/-2ohmcu.ta0/:lmwrug/nmd.t/wipnosbw-tu.

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 +5  upvote downvote
submitted by assoplasty(108)
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occnitnsotrsoVai dcsereesa olbod lofw nda shtu seedrceas odythasctir eerur.ssp esSem tceurno ieittvnui btu I hda to oolk tsih pu rfate I gto it gwnor, oot.

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 +0  upvote downvote
submitted by bgreen27(6)
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Cna esomnoe lehp a trhroeb ot?u My kihnnigt wsa taht caedsienr lfudi in het itntriseiatl adsle ot eisedcrna ,ylpmh so I htohugt yteh erew liokgno fro mhgneosit to msisutale gihh ltaudtei rlymuaonp eadem ro teralria olrnpmayu ,NHT hhiwc I ma tpyrte seur obth eadl to rpynmalou .emaed heWre ddi I og nwo?gr

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ali_hassan  siht itgmh eb sdtuip utb i ogt it ihrgt hitw tihs cr lsneeearitoina:a nlmr"ao" lfuid 0.9%( esn)lia in obyd = aecisern ylmhp lfw.o tluybleaos on imdcela npeccto ot it, ustj iclgo lol +


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