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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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fcl@okebf;eca

slnuniI osde aylp a rloe ni nirngbgi cbak K+ nito lclse vai daolimuton of H+K+/ xah.eceng This is uacsebe ti slpeh ot adsdrse the ittoiaecockd saett fo eth .tnaptie yB bignring Hp sleocr to ,ebasilne hrete si unerrt fo K+ tnio hte csel,l iewhl +H oesmc bcak out fo the l.lces

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an_improved_me  H,voweer you are tig,rh in ttah oto ym ,olnekwgde hatt si ont teh inma wya lsuniin siflnceeun ;K+ ti si mreo iav the sTNaAPea as uoy vahe .nnmteoide +1


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submitted by โˆ—nala_ula(127)
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nI aitidceb iskoodi,tcesa eerht is ecdraisen aidc ni eth rcrxtluelalae a.scpe ndicAcgro ot FA hrete is a erlunatsllrac sithf deu ot decedrsea iinlnsu hatt ldaes ot moer H+ nneigtre het llec ni gxahceen fro +.K ihsT edals ot aykehmierapl hwti ledepdte aureliltrcnal oersst fo K.+ Tehre si laso icomsto usdiesir that edasl to niedseacr K+ ossl in teh irneu dan ttloa dyob K+ tedn.eilpo Teh tesuiqno kass hatt si sotm eklyli ot ceeaserd itwh lsiiunn yp:eathr erusm timupsoas irnntcaoctnoe liwl eaedscer as +K si own exdehgcan rfo +H snidei the e.llc

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cienfuegos  nAaiiltodd WU fun tcafs agngrredi siusPaotm dna AKuDe s: aucinto igngvi nisluni and IV idlsuf ot ardheedytd reycglmcpyhie easceub i rfscoe K in lcsle ciaugns tasf resadcee fo ruexelartllca Pt,iaosmsu hstu vige K mianenptpltseuo enev hwen meurs K vaedeetl +3
linwanrun1357  yWh eiurn +K oesd tno dcae?eesr +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 raege hatt Surme K cdreeeas is eth btetre ,srwnea but dwotn'lu eUrni K slao earscdee ceon oldob surag oseg owdn tiwh nuinsli etetrtman .e.(i imoscto useiirsd dlwou een)ss?l

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