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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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o/pa-k-nrz-iav/cdd/a.m-i-aqptwsgowoelyg-emwopehiah-opotlcyrs-oaiaaitots-ypfotra-taotul-ohsmlmisonatw/:th-p/hsze

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utap2001  Nc,ei a irantlbil puc!iret +



 +9  upvote downvote
submitted by โˆ—sinforslide(63)
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weievOvr of vaaSli trdui:copon

  1. Aacirn lscel rectese niitial ,lavasi hwihc is tinoscio to ps.aalm
  2. Dlutac clsel ydfomi iaintil savlia, gcsuani oprsearbitno of ,N+a C-l and eiorsnetc fo +K and CO-H. -g t;& ehirhg K+ dan COH- aeniotcontcnrs, woelr +Na -Cl esaninonttoccr ni vliaas. nI itsh c,ospsre REMO aClN si serab,breod imnagne ahtt aasivl desn pu nibge tnhcpooyi to malpas.

luaDtc apsreoontrbi sseropc is eidnehrd in -howhflig ta,ests chwih eucsas soioictn aasvil

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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)


 +3  upvote downvote
submitted by โˆ—usmleuser007(464)
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ayiarvSl eenortsci .1 tA wlo wflo = hHgi icraoentntcon of amptu;ssio olw casnctrtooinen fo ui,dmos bi,brca m&;pa cohder2 l.i ta hhig lfow = wlo nttrccooneani of a;itospums ihhg rosntocenctani of ous,dmi ,acribb ;am&p ridocehl

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sherry  shtT'a lcxyeta waht I aws innkthig newh I saw taingk eth set.t tBu I swa ecsrddkeita by mase OCH3 elv.el nCa dmoobsey pnexila itsh aprt ot ??me +
smc213  sreyh@ rvteoc/eiwso2/~tetn/tt/t2eyrv/.i.ac:fs.ahapprosembc/piscsnniif%el0hsctew%uat.ikebwlmaeiprrm0 +2
charcot_bouchard  aBecseu islaravy tduc eoevsrm Na ;amp& lC elwhi cetrees K ma;&p 3oHc in ulnm.e In wlo ofwl tera HCO3 mp;a& K nci eucebsa cdut is ingdo tis hgitn ofr rome ei.mt At hgih lwfo eart K silylthg ecd a(s acnt eb dcteers as m)chu but COH3 yasts omtals .easm het eorsna is ighh fwol iaietdcsn eghrih mlimeobtas ;&map hghire ribacb tod.rcpnuio +
cienfuegos  gaRdrigen eth abcirb aiv( SBR hlyo,sPyogi chihw siaenxlp wfol tear as omcing wodn to tnoa"cct tmie" heewr olsw lwfo woalsl rome porstboaerin of aNCl): hTe nloy noi ttah eosd otn โ€œfโ€ti itsh taoctnc meit nteonaaxlip is ;C3Oโˆ’H H3Cโˆ’O ocnireste is estleiycelv tudsmaltie nwhe svlaia csinteoer is aed.titsmul +3



 +2  upvote downvote
submitted by โˆ—chandlerbas(118)
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tP 1 (aekts itcrci ciad)

tP 2 aktse( yd)acn

Pt 1 2x( asialv = ghih ofwl a,tre lxa2NC vtenralre[i - greoin])

tP 2 1x( lviasa = lwo lfwo ,rtae axNCL1 [gireon tno ]p)mi

1tP = rciitc cdia its*m uldcta llce ot rseeetc ucratlrinllae talduc oartges fo acbrib. carbib nerletuisza ircitc d.cai hust owl icbb.ra

2tP = wol wolf rt,ea usht rmoe bbcira rsoadreebb tou fo dc.ut shut owl cbibar

ywh od hyte aehv eth same irb,cab scuabee low fwlo aert.

*avi hcA gnlias tsdnatinocur to ersancie rltracniealul ucdatl cmaculi aeresel g--t;& O3HC eortsd iedisn tuldac ellc

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 +1  upvote downvote
submitted by โˆ—stepwarrior(29)
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lla infe and daynd pxeetc betcranibao s'int csaonntt hwit oflw tear

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 +0  upvote downvote
submitted by usmledelirium(0)
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I hnitk eyvonere si cgnosiuf no aBcrib ewnh you nac usjt capmoer flow taer adn .NCLa

ghHi lowf eart = x2 laNc ; amse cbb aowiLr wfol reat = x1 cNal; maes biabcr

siht hossw atth nehw lfow si ,olsw you aer leab ot brarbseo emo.r

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