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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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bel;cc@efafko

uniInls sode lpya a oelr in inrgbing bcak +K inot esllc aiv adooumtiln fo +/HK+ axgnche.e Tish si beasuce it hsple to eaddssr the cdtcioektaio taste fo the tnap.eti yB bngiigrn Hp relsoc to b,isealne rehte si tnrure fo +K niot eth c,llse wleih H+ mocse kcba otu of eht lesl.c

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an_improved_me  re,voHew uyo aer gt,hri in that too my kwnegeldo, htta si ont eht nmia wya iluinns unefeincsl +K; it si rome vai het sPTaNaeA sa uoy vhea nedoni.mte +1


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submitted by โˆ—nala_ula(127)
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nI beidacit t,odesoiicsak rehet si iceresdan idac ni eht xracleutlrael .eapcs dgAinoccr ot AF tereh si a rlalutlcnsear ihsft due ot aeddreecs unnilsi ahtt desla ot roem +H rteeingn teh clel in xegnahce rof K+. hisT lsdae ot lmireaeyahpk hiwt peeteddl ialrenlctlaru oersts fo +.K eherT si olas smiocto esisruid atth dasle ot nesdareci K+ ssol in teh neuir dan lttao bydo K+ ele.diontp heT oqsteniu saks htta si smot lkyiel to sdeeecra whit luisnin r:pyehta rusme tiasoumsp carnocttonein lilw seacreed sa +K is onw edcehgnxa ofr +H isndie hte l.elc

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cienfuegos  idoaiAdntl WU fnu sfact rirngeadg maPtiusso and AKe sDu: outinac viiggn uslinin and IV dufils to etadhdrdey hepcyimcrgely saeebcu i frcseo K in lcesl scnugai stfa descreea fo caulraerlltex autoPsims, shtu vegi K enimttnlppuaseo evne nhwe srume K eavedetl +3
linwanrun1357  Why rneiu +K seod ton cdree?sea +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 eraeg ahtt mSure K eercasde si teh ebertt ne,asrw btu nod'tluw nreiU K olas edceares neoc dolbo uagrs geos nowd hiwt ulnnsii enamttter .ie.( tioocms rsiuseid olduw snl)se?e

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