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Retired NBME 20 Answers

nbme20/Block 4/Question#16 (reveal difficulty score)
An investigator wishes to determine the ...
Ductal ion reabsorption is more efficient at low flow rates ๐Ÿ” / ๐Ÿ“บ / ๐ŸŒณ / ๐Ÿ“–
tags: GI

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 +9  upvote downvote
submitted by โˆ—masonkingcobra(408)
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sawoitswhtht--at-oig/wdeki.al/uowsialoaorcyoe-pm-at-szdrot-serneso:ppy/pthmoapqlt-c-m-fvglyph/ainmzoitoa-o-/aha

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utap2001  ,icNe a rliltanib iecpur!t +


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 +9  upvote downvote
submitted by โˆ—sinforslide(63)
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veiwOerv of laaSiv cuot:npirod

  1. arnciA slelc etscree ltniiia vail,sa hichw is toinisco to asp.lma
  2. Dultac elslc mdfoiy liiiatn ailv,sa iuagncs oirbropstnae fo N+a, -Cl nda ersceonti fo +K dna O.C-H t-;g & hrgihe +K adn -OCH ia,coctneonrsnt rewol N+a Cl- ctnensocntorai in lavsi.a nI hits ecrsops, MOER aCNl si ,adroebbesr nmneiga thta aailsv snde up gbien yotcophni to als.amp

tlcDau broesaotrinp esrpocs is ddnrheie ni gh-wfloih t,satse chwhi sascue scnitooi ilaasv

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https://www.researchgate.net/figure/Relation-between-the-concentrations-mEq-l-of-sodium-potassium-chloride-and_fig3_46598804

if you look a the figure HCO3- stays relatively constant from flow rate of 1-4

+2/- j44n(141)

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 +3  upvote downvote
submitted by โˆ—usmleuser007(464)
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Slayirav scnrteioe . 1 At owl wlof = hHgi rctinotoancne fo ;mopitssua olw itancotrcnseno fo iomsd,u i,bcabr apm;& 2.drh ilcoe ta ighh wlof = wlo notncnrtoaice fo smipu;oast ghhi ciattnsocneorn fo suodim, bcbrai, mp;&a rdhloeci

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sherry  ths'Ta cayextl awth I was ignkthin hwne I saw intakg het e.tst tuB I asw sciredktead yb amse H3CO velel. Can mseoodby xeaipnl stih tarp to m??e +
charcot_bouchard  suaceeB rlasviya tdcu oemvesr Na p&a;m lC iwhle tserece K ;mp&a 3Hoc ni m.nuel In owl owlf tare OH3C pm&;a K inc uecsbea udct si doign sit itgnh ofr eomr .mite tA ghih owfl trea K tgsylilh cde as( tanc eb reectds sa mu)hc but OCH3 syast msotla s.aem the osnear is hihg owlf tneiadsic ehrhig sbmilometa am;&p grehhi bibcar rcpd.otuino +
cienfuegos  gRreadgin the rbbaic v(ai SRB lyyio,hgPso hichw xaesnpil owfl trea as mgcnio dwon ot c"actnot "imet eewhr slow olwf lsalow omre nobpaserrtio of :C)alN Teh lony ino thta deos ton iโ€tโ€œf tsih ctcntoa imet onintxeplaa is Hโˆ’O;C3 Oโˆ’3HC icernetos si scvieleylet iadmlttues nhwe viaals eietsnrco is tmta.ldsuie +3


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 +2  upvote downvote
submitted by โˆ—chandlerbas(118)
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Pt 1 st(aek ticrci dci)a

Pt 2 ektas( c)ndya

tP 1 2x( vaasil = hihg fowl rae,t a2lCxN revnr[aeitl - g])nrioe

Pt 2 x1( svliaa = lwo flwo ea,rt aLNx1C irgne[o otn pmi)]

Pt1 = cctrii daic mtis* uctdal ellc ot etecsre trcleianlrlau ldtauc oratgse of rbca.ib rbbaci rtsalneuzei ciitrc idc.a uths owl bcir.ba

2tP = owl owlf ea,tr usth moer cabrbi adebsrrebo uto of .ctud tush low iabrbc

ywh od ethy aevh hte esma ,arbicb auebcse owl fwol rtea.

*via hAc algisn ntaisruodnct to incarees ituellaanclrr ldactu mcaucil eaeerls t--;&g H3CO resdto eidnsi ulctad llec

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 +1  upvote downvote
submitted by โˆ—stepwarrior(29)
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all efni dna ndyda peetcx riobebntaac nits' nctnoats wiht flwo rate

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 +0  upvote downvote
submitted by usmledelirium(0)
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I nhkit enyveero is gnscfuoi on ciarBb nwhe you cna juts eopmcra wlof taer nda a.LNC

Hgih wofl erat = x2 Nlca ; saem bLco ibwra fwlo aert = 1x lN;ca aems bcairb

isth shosw hatt wehn flwo si sw,lo ouy are labe to bresboar r.ome

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