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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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o;@cfakefcelb

iunnslI edso lpay a role in ngiinrgb akcb K+ otin elslc iav mlnuoaoitd fo ++KH/ ge.caexnh iThs is seceabu it shlep to dersdas hte ciotkeiaodct teats fo eht itne.pat yB inrnigbg Hp oelscr ot enlaieb,s ehter is urtenr fo K+ toin eht clse,l lwhei H+ comse bcak uot of eht ecl.ls

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an_improved_me  o,erweHv you rae ig,rth in atht oot ym weokdnge,l ahtt si nto eth ainm ayw isinlnu uesnficnel ;+K ti is emor vai eth ePasNTaA sa oyu vhea emi.tneodn +1


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submitted by โˆ—nala_ula(127)
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In tdaiebci c,idsaokeoits eehtr si irsdaceen acid in the larculaexterl s.epca cnAigdcro ot FA ereth si a steraucrlnlla stfih ued to asddceere iniulns hatt esdla ot roem H+ eritngne eht llce ni cexghnae orf .+K siTh dlase to haikleemapyr whti deeptdel celarunillrta toesrs fo +.K hTere is olas smoctio eisidrus ttah aseld ot ieadnresc +K ssol ni het uenri and tatlo bdyo +K ptedo.leni The tqeusoni skas thta si msto elikyl to edecaser ithw ulisnni h:paerty mreus iuosatmps rcooatennnitc ilwl eesrcade sa +K is onw ngehadxec fro H+ esniid eht cell.

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cienfuegos  dtAnliioad WU fun asctf girgneard Pumstioas nda K:Aesu D otaunci giingv lusiinn dna IV idlufs to deatderyhd imphecgyeyclr easucbe i fcosre K ni cells guscina tsaf areecsde fo crelxaaretllu aPsus,tiom uhst gevi K uotsnlempenitpa enve wenh surme K aetelevd +3
linwanrun1357  yhW inreu K+ dseo tno deaer?esc +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 aeegr ahtt uemrS K aderesec si teh tteerb ne,wsar tbu tounl'dw Uneir K saol eascered nceo olobd gursa egos nodw wiht uininls eatnerttm e(.i. itsomco eiirdssu lwduo eelsn?s)

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