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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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a;e@fcfcoebkl

nIusiln does alpy a lreo in nniribgg abkc +K oitn sclel aiv omitldouna of ++HK/ xceeg.nha iTsh si cabseeu ti ephls ot adrdsse het kciadtotioec attes of the ptet.nai By gngnibir Hp orlces to een,blsia ehrte is rerunt fo K+ noti eth lscel, ewhil +H escom cabk uto of the .llces

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an_improved_me  weHr,eov you are htg,ir ni hatt oto my ,gdokwelne ttha si ont teh ainm yaw lisunin nlceesuinf K+; it is erom aiv het aNsaTPeA sa oyu aveh tind.nmoee +1


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submitted by โˆ—nala_ula(127)
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nI itibcaed cisk,isaotode rhtee si edinecrsa daci ni teh rlallrxuteeac acs.pe orncAigdc ot AF rteeh si a cltlnuaearslr itsfh ued to deesacder nunilis ttah lseda ot rmoe +H egtniner teh lcel ni cheegnxa rof .+K ihsT seadl ot hpeakyailrme ihwt peetdedl rcnetulirlala rosset fo K.+ rhTee is salo ocimsto dssreiui thta dslae ot edsrnaeic +K sols ni eth ienur nad ttoal ybdo +K e.ptleondi hTe quetniso asks htat si tsom ikelyl to ecdaerse twih nisiuln pe:yarht umrse aspuistmo tnateciocronn wlil reeecdsa as K+ si won ahxcdeeng orf +H iinesd het lce.l

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cienfuegos  lianitddoA WU fun tacfs griarnged stoPsimua adn sDAeK :u utnaioc vggiin unsnlii nad IV sdiflu ot heedartddy ehmrycegpyilc acbusee i scoref K ni eclsl agsinuc saft ceeeasrd fo actreuelarllx ossPaium,t hust vgei K puneetniamltpso nvee hnew rmues K elatedve +3
linwanrun1357  hWy enuri +K eods otn dr?ceesae +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 eaerg tath uSmer K dcerseea si the eettrb aw,senr btu tno'udwl inrUe K asol eerceads ecno olodb ugrsa oges nwod twih lsiuinn nreaemttt .e(.i tmcoosi uisirsde wlduo sn)e?sle

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