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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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kfela@o;feccb

iIsnunl dsoe ylap a role ni gbgiirnn back K+ noti ellsc via nluaodmoti fo KH+/+ cx.haneeg shTi is ucaeseb ti elhps ot saersdd teh accoieotdkti estat of eth tnti.epa By nbrngigi Hp cselro ot ,ebinslae rheet is ruertn fo +K noit eht c,lles hweli H+ soecm akcb uot fo eth lc.lse

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an_improved_me  roH,veew ouy era igth,r in ahtt too ym leweogd,nk htat is ont het mian ywa nilunis sfnluniece K;+ it is mero iva teh sPaATNea as uyo evah ndetne.mio +1


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submitted by โˆ—nala_ula(127)
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In idbeicta to,eiosscdaik ehret is eaeridnsc aidc ni hte calateurrllxe acse.p Acgdnrioc to FA eehtr is a rsaaelrtllncu itfhs ued to edercased iunnisl tath ledas to eomr H+ entrnieg teh lelc in cnaghexe orf +.K hiTs edlsa ot lrphyiaeemak whit deltepde lcrnreltaiaul sosrte fo .K+ rTeeh si osal ciosotm seirsuid that adsle to csedanier +K lsos in hte nreui nda ttalo ydbo +K inodpl.eet eTh oiuentsq skas ttah is otms yekill ot eaercdes hiwt nuliisn eyhatp:r rsuem ismpatous ncotcrneaitno illw edcarese sa +K si onw aenhegdcx rfo H+ idnies het cl.el

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cienfuegos  iAdodailtn UW ufn cftsa giradreng sPmositau nad eDs:uK A ioctanu gnigiv uilsinn nad IV islduf to ddhadyreet hyiermylgcepc cebaeus i srcofe K in cslle ancgusi tfas eedcaers of alclxteluerar Pomsa,iuts uths eigv K tepiotluspnmaen nvee nhwe resum K evtealde +3
linwanrun1357  yWh ruein K+ dose nto rceadse?e +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 gaere ahtt muerS K dercaees is teh teretb ,wrsena but od'unwtl Uiern K aslo daersece ecno lobdo grusa gose odwn hiwt nisilun mrneattet e(.i. oimcost sdisiure udwlo lne?)ses

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