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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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koacfef;cleb@

snIiuln dseo aply a lero ni iigbrngn kbca K+ inot lcels iav miolnoatud of +/K+H gneche.xa ishT is sceubea ti pehls ot sseaddr the ctcotkdoiiae taest fo hte .intpate By rnbgngii Hp rceols ot eanils,eb etehr si rnrtue of K+ tion teh escl,l weilh H+ cseom akcb otu of eht ll.cse

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an_improved_me  vH,wreoe uoy rea h,grti ni taht too my dnewoge,lk atth si otn teh ianm ayw liinsun lesnficenu ;+K it is ermo iva eht aaNPTeAs sa uyo aehv doeitmne.n +1


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submitted by โˆ—nala_ula(127)
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nI ecdtiaib isooadestkic, htree si arnesiedc idac ni het taruelecrlaxl epas.c icAcorndg to AF erteh is a lletrarsnaulc iftsh edu ot eseaecrdd niulins htta dslea ot remo +H eregnint hte ellc ni cnaeghex orf +K. Thsi adels to iahaplyemkre wthi tdeedlep lanarrliutlec rtsseo of .+K Terhe is osal tomicso sriuedsi tath elasd to dasnicere +K sols in eht euinr and totla ydbo +K d.elonpite eTh qosneuti sask ttah si otsm iyllek to aedceesr tiwh iinsuln y:epathr semur tpimuoass cerncntiontao lwli reeeacsd sa K+ is own caegendhx rof +H idsien eth lelc.

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cienfuegos  ailnddtoAi UW unf ftsca rgnidegra mstoiausP and KsA:eDu itnaocu viiggn snniiul and IV idulsf ot retheydadd ccleriyyhempg eubsace i rfecso K in llsce ainuscg afts eesdrcae fo llxeraaculetr ssoPt,uiam suth igve K smnpluopieteatn nvee nhwe uersm K lveedtae +3
linwanrun1357  Why uiner K+ dose otn ?seadcere +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 regea atht eSmru K eraecdse is eth tbrete ae,wrns tbu tn'louwd Uneri K laso ecdreeas enco blood usrag geos wdno hwit ilniusn tttearmen i..e( otocsim iuiedrss wluod ns)lee?s

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