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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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kco@;aelfcebf

Iunlnsi oesd play a oler in ringibgn akbc +K itno ellsc iav tudlmoanio fo HK++/ hea.exgnc hsTi is sceeabu ti shlpe to edassrd eht daocieotctki sttae fo hte etitn.pa By gibnnrig Hp slceor to ls,ebaeni hetre is turner of K+ otni teh els,cl elhwi H+ mocse ckba out of eht csl.le

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an_improved_me  ,erwvoHe you rae hgirt, ni that oot ym onlk,egdew tath is otn eth anmi wya isilnnu seculfnnie ;K+ ti si omre aiv eth NPAseTaa sa you vahe to.inendme +1


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submitted by โˆ—nala_ula(127)
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In dciaitbe ai,sikedocsot reeht is idsnecear adci in eht lcleautarelrx .saecp cgdcionAr ot AF heter si a arlnrlaletcsu htisf eud to ardedsece lsnuini ahtt sdael to orme H+ rgnteein hte lecl ni aeehcnxg for +.K hisT adles to mehkyprliaea thwi tddleepe runarlitaclle ssreot fo K.+ rhTee si alos ostocmi iiderssu ttha dlase ot earisnecd +K sosl in hte ureni adn aotlt odby K+ l.epitedon Teh tqusenoi kssa tath si somt ylekli to eadrcees htiw ninilus erhy:apt srmue tipsouams inooannctertc wlil seadecer as +K si own xeecghand fro H+ inesdi het .cell

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cienfuegos  diotadniAl WU nuf scaft irdegngra timPouass adn :esKAuD otuiacn ngivgi isniuln dan IV iudslf to tdyderhdae cyirpyclgheme seacube i orcfse K ni lsecl uciangs staf eeaesdrc fo lltuaxrlearec atmsuo,siP shut gevi K toplnneetiusamp vene nwhe ruems K vedteael +3
linwanrun1357  Wyh ueinr K+ sdeo ton ?seeedrac +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 ttha reumS K edaeescr is hte terebt wnre,as utb not'udwl Uiren K sola cerdesea coen olbdo rsgua esgo nwdo hwit nnluisi enmtrttae .(i.e cmtisoo usdiiser wolud e)elsn?s

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