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Retired NBME 21 Answers

nbme21/Block 1/Question#37 (reveal difficulty score)
A 35-year-old man with diabetic ketoacidosis ...
Serum potassium concentration ๐Ÿ” / ๐Ÿ“บ / ๐ŸŒณ / ๐Ÿ“–
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submitted by โˆ—an_improved_me(91)
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fa@fboeeclck;

islInun oesd ypla a orle ni gbgrnnii kcba K+ iotn leslc iva uodamitnol of K+H+/ he.ecganx hisT is suaceeb ti hlpse to srdaesd het tkdatoioecic tstae of the eit.tanp yB gnbiigrn pH esrocl to ,leeinbas there si rrteun fo +K iotn hte le,csl hilwe +H omecs bkca uto fo the clls.e

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an_improved_me  rowHvee, you rea hrt,ig ni that oot my eogenkldw, taht is otn teh mnai way nuilsni neefnulcis ;K+ ti is omer aiv teh PeTaNsAa as yuo ahve ti.neodnem +1


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submitted by โˆ—nala_ula(127)
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nI cidabiet oscoa,sdikeit rthee is aeecinrds cida in eht araelxretcllu spa.ec cgdroAcni ot FA rheet is a rlsacanleulrt tifhs ude to acdesrdee lsuiinn htta aleds to oemr +H tgeienrn eth lelc ni neeacxhg rof +K. This sdlea ot mpyehelakira ihwt peedltde teilnlaurrcla sstreo of +K. ehTer is lsoa imoctso rusidise htat ldase ot naesidcer +K osls in hte ienru dan talot dboy K+ topee.dlni Teh qsuoteni saks taht is somt yillke ot ceeersad twih iuinsnl p:teryah rseum oatsmsuip caonirtneontc ilwl sereacde as K+ si onw eeanghxdc orf H+ sendii eht ec.ll

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cienfuegos  idlotniadA UW ufn stcfa gndrgaeri soPmsiuat dan AKsueD: atiuocn ivnigg iunsnil dan IV isuldf to eahdryddte ygmicprlcyehe busaece i oscfre K in lcles nscguia sfta rsecdeae fo culxaarltrlee tuasPomi,s tshu ivge K mnptnaetuloieps even hewn mseur K adelteev +3
linwanrun1357  hyW runie +K eods tno ?creseade +3

This explanation is faulty. Insulin causes K to go inside via upregulating NaKATPase activity. Nothing to with H+ exchange as far as Insulin is concerned.

H and K exchange is separate from this.


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submitted by โˆ—peachespeaches(2)
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I regea taht eSumr K screedea si teh reettb swrnea, but lonu'wdt rienU K laos esdreeac oenc odobl sguar ogse ndow twih ininlsu etmnrttea i..(e citmsoo sudiires wlodu snes?l)e

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