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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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blaeo@kfe;ccf

nnusliI esod pyla a oerl ni ngbingir abkc +K tion eslcl iav omlanuotid fo +/+KH .eacenghx ishT is suebcea it psleh to rsadsde hte iokteiatodcc asett of eth .neatpit yB grbginin Hp relosc ot eb,lnsaie rethe si nurter fo K+ into eht sc,lel hewil +H oescm kbac otu of het lsc.el

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an_improved_me  ,rwveoHe ouy era ihr,gt ni atht oto ym lno,gkewed tath is ont hte main yaw ninsilu lncfseineu +K; ti is rmeo iva hte TaaNsAPe as oyu have eetn.oindm +1



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submitted by โˆ—nala_ula(127)
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nI ibdctiea ck,daoeoissti rhtee is dcsareine cdia ni teh lrleaructxael cse.ap onccrgAdi ot AF tehre is a lsuaellctnrra stihf edu ot decrdeesa iinlsnu ttha elsad ot meor +H eernngit teh lecl ni geanehxc for .+K Tihs daesl ot yiekmaalhpre tihw eedpedlt atalurcirelnl sserot fo K+. erehT is lsoa tioscom eirisdus hatt asedl to sieaecdrn +K olss in eht eruin nda taolt byod +K .npiloedet ehT utoeqisn kssa ahtt is msot kyliel to eesrcead ihtw lnuinis th:eyapr meurs situspmao ntcaecooinrtn lilw radeeecs as +K si nwo nxaedcheg orf H+ disine hte le.cl

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cienfuegos  iaodnAdlit WU fnu catfs gendigrra smioPstua and :u ADseK aucitno vggnii iuislnn and IV diusfl ot dddyaheert pcreychgmeily ubeecsa i oesrfc K ni eclls sgaiunc tfsa eercesda of lrartlclexaeu o,amiPtsus suth giev K emnpulstitapoen nvee hwen meusr K dtveelae +3
linwanrun1357  yWh nurie K+ deso ton c?aeerdes +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 eaegr hatt remSu K eedceras si eht rtbete wrae,sn but l'nudtow rUnie K lsoa ecaerdes cnoe obold rgsau gseo odnw wiht ilnnuis trmntaeet ie..( tocmsio disesiur uldwo leesns)?

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