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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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b;l@ccfaeokfe

nisnIlu dose yalp a erlo in grgnbiin acbk K+ tino csell iva monuiatdol of K+H+/ a.enechgx ihsT is eabescu ti shlpe ot esrdasd teh kaiiotccedto ttsea of het iepat.nt By nirgnbig Hp osclre to ebailn,se rteeh si rrnetu of +K into eht sllc,e ihlew +H mosce kcab tou of het llc.se

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an_improved_me  v,weHroe oyu rea igtr,h in that oot my gwe,kdlneo htat is otn eht mnia awy uinnils fnuislcene ;K+ ti si mreo aiv hte sATNaPae as you haev neno.mtedi +1


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submitted by โˆ—nala_ula(127)
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nI ictdebai kacoso,isedit etehr is csdrenaei icda ni het urllclxaetear aecsp. nArdgiocc ot FA ereth is a tnlsaerllacru sifht deu ot creadseed luiinsn thta dasle ot rmoe H+ rennetig teh cell in egchnxae orf K.+ sTih alsde ot pkrhaaliyeme whti edtldeep tullnaralerci osrset of .+K eThre is oasl stocomi rsedusii taht eadls ot iecsrndae +K lsso ni the nieur adn oltta body +K do.eltnpie ehT ioeuntqs sask that si stom yeklli to csedaree wiht islniun :yphreta ruems omuaitsps tooanencctnri llwi sceaered sa +K si now gachexden fro H+ dniesi teh e.lcl

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cienfuegos  oldiAitand UW fun cafst ragnrdegi sismuaPto nad DsKAe u: inaocut gngivi nnsilui nad VI fslidu to adyherdted hgcpyicereyml ucesbae i fescor K ni lselc aginusc satf scaredee fo rllaexctuaerl Puas,imtso thus eigv K nmusnetiteoappl evne ehwn mesru K ledateev +3
linwanrun1357  hyW ieunr K+ eods tno ese?cdaer +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 geear atht Smrue K esrcadee si eth bteret res,wan tbu wltonud' ireUn K saol edrcseea econ doblo asugr gseo dnow whti isinuln treeanttm .e(i. iotmsoc eusidris udlwo )?eslsne

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