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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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inlunsI sdoe apyl a oler in iigrnbgn bcka +K nito lscle via nidulomota fo K++/H cghaex.en shTi si easbceu it hselp to adessdr the iiacocttkeod tatse fo hte .ttipnae yB ignrgibn Hp seolcr to ,salinebe herte is renutr fo K+ onti teh esc,ll ewlhi H+ smceo kabc tuo of teh e.llsc

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an_improved_me  ,erevowH you rae tirgh, in ttah oot ym do,egnlwek htta si not teh inam way sulinni uinclfseen ;+K it is moer iav hte sPaeNTaA sa ouy aveh oei.tdmnne +1

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submitted by โˆ—nala_ula(127)
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In bieacdti ds,aotiokices trehe is ndecisrae adic ni the txallercauelr a.psce cirAdgcon ot AF teehr si a tcsualenrrlal fhsti ued to ceradeeds lnuinsi thta ealds ot eomr H+ rtgeinen hte cell ni gxehneac fro +.K hTsi daels ot yirpelaamkhe hwit eedtldpe lclrulentraia sersto fo .+K ehreT si losa ciomots issdirue ttha sadel to dnseairec +K lsos ni het ernui dna ttloa obyd K+ i.ntdeelop Teh nutieoqs asks that is ostm elykli ot eeadscer tiwh usilinn pat:hyre surme umassitop toaincocennrt lwli ecaedres sa K+ is nwo chdeaegxn ofr H+ niesdi eth .lelc

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cienfuegos  addiltAino UW nuf cstfa grnrgedai atmusoiPs and :AKeDsu uoictan ggnivi nsinuil and IV lsifud ot rddhtdaeey licycpmregyeh ceeubsa i recofs K ni ellcs nucisga afts creseeda of tealleulrxcar uPstmoi,as hsut evgi K eiaptnsltpeomun neev whne emrsu K eatedvle +3
linwanrun1357  yhW eurin +K osde not esceaerd? +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 ageer ttah eumSr K raescdee is teh reetbt snae,wr ubt t'owdlun eriUn K laos ecesadre ncoe dloob usgar oegs wnod thiw ilinsun aetettrmn e.(i. mscoiot ssreidiu olwud ess)n?le

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