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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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w-pptivt-c/ms-oc-ryatd-zsa/aofatphhihwtg/a-allosgoaaws.-nzyyao:hiptistaomt/rmteqodooiooa--lr-eme/seolppk-iu-hnw

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utap2001  e,cNi a brilaltni rptieuc! +


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 +9  upvote downvote
submitted by โˆ—sinforslide(63)
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vvOweire of Slaiav oiutron:dpc

  1. Aarcni sllce eceerts iintila las,iav wihch si ctioinso to lp.masa
  2. cltuDa scell dimyof ianitli vaials, ugcanis ornptsbeaoir of a+N, C-l and etocisnre of K+ and .HO-C t- ;&g hheirg K+ adn OH-C atcncor,snotien lrwoe aN+ l-C csoetroinnctan ni vasila. nI shit oces,spr MOER lNaC si arebbord,es nigaenm hatt lsaiva ensd up bngie pichtnoyo ot .aamlps

lDutac nobirstpraeo epcross si iehddnre in ohwg-hlif ettas,s hhwic saeucs nosotcii lsviaa

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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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ailrvySa eneritcso . 1 At wol lfow = gihH noearincttonc fo taomuip;ss owl ocntanosrneict fo dso,imu cira,bb m&p;a rhid2loc.e ta hhgi flwo = owl cnttireaoconn of saioutspm; high oaeisrnctnoctn fo um,oids c,rabib a&;mp hoicrdle

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sherry  at'sTh cyletxa whta I swa ningkiht wneh I aws kingta teh ttse. Btu I saw kiedtdercsa yb same OHC3 l.eevl Can bdemyoos lxpeain stih rtpa ot ?em? +
smc213  ye s@hrrl/y/./paieetomfkeeriarcihvnpeibtw2s/n2sst.st%htswa0tvepnw/tfmel.abepotc/imcs.ce0ircia%:our~ +2
charcot_bouchard  cuaseeB ilsyrvaa udtc omersev Na a;m&p lC ewilh eteecrs K &p;ma 3Hoc in .elnmu In wlo fwol rtae 3HOC m&;pa K inc bcaeues tucd si gidon sit ghnit fro meor meti. tA hhig wfol etra K lgihslyt dce s(a anct eb edstcer as uhm)c btu H3OC syats masolt .sema eht oernsa is high lfow aiitencds rehhig ietmmlasbo p;&ma ihegrh bcairb noupctiodr. +
cienfuegos  rgRdgeani hte bacirb va(i SBR oyoilg,syhP wihhc elpsxnia lfow rate as cnimgo nodw to acotcn"t imt"e hrwee lswo olwf awslol moer ibtresoprnao of :)NlaC Teh olny ion htat dsoe ont itfโ€โ€œ thsi ccntato emti onnaplxteai is OH3โˆ’C; Hโˆ’OC3 scenitroe si vleesctylei tulidamest enhw vaails treesnoic is tdamluei.st +3


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 +2  upvote downvote
submitted by โˆ—chandlerbas(118)
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tP 1 s(teak rciitc ac)di

Pt 2 atek(s adn)yc

tP 1 (2x lasaiv = hihg lfow er,ta xCl2aN l[vaerientr - neg])ori

Pt 2 (1x asliva = low olfw tr,ea CL1aNx [ionrge nto im)]p

t1P = rcciit iacd stim* daltcu clel to etsrcee entllicrulara tcdlau rosgtae of ib.acrb abribc iuralezestn tcirci a.dic htus wlo cbrb.ia

2Pt = wlo fwol et,ar shtu rmeo bcrbai orreesbdba tuo of cdu.t uhts wlo baicrb

wyh od eyth hvae eth same rbbcai, seubace owl owfl ar.te

i*va Ahc gilnas tinnodturcsa ot sereaicn anliclearrutl ctdlua cclumia eeeslra g-;-t& 3HCO ersdot einisd adlcut lelc

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 +1  upvote downvote
submitted by โˆ—stepwarrior(29)
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all fein adn yddan pecext irnbteacoba tsni' ntnscota itwh lfwo etra

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 +0  upvote downvote
submitted by usmledelirium(0)
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I hnitk yneveoer is usgcionf no iBbarc nhew ouy can usjt aromepc lfwo etra nda L.NCa

hgHi wlfo reat = x2 lNac ; msae rabb icowL wlof arte = x1 c;lNa emas cbrbia

ihts wsosh ttah hewn owfl si ,sowl oyu are laeb ot beorrabs .omre

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