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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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cl@ofec;kebfa

ilusnnI eods lyap a rloe in rgignnbi kcba K+ tnio elslc avi idmoutlaon fo H/++K hxegna.ec shTi si ubesaec ti slphe to raessdd hte kitcicdoaeto taste fo teh .paeintt yB niibggnr Hp colesr ot iee,bnsla reeht si rutner of +K nito teh ,lecls elhiw +H moesc ckab out of the lel.cs

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an_improved_me  Ho,veerw uoy rea hg,itr ni atht too my ldgo,wenek that is nto eth amin ayw nliuisn isufleennc ;+K ti si erom via het sAeNaTaP as yuo vhea .tnemineod +1


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submitted by โˆ—nala_ula(127)
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In tediabic ,iocoidesktas ereth is eciesdran idac ni eth rrulxcellaaet cs.pae ccrgdnioA ot AF eerth si a lsaluarenlrct shift ued ot easederdc lisninu ttha esdal ot orem +H einregnt het lcel in xehcgnea rfo .K+ sTih aldse ot pahmireeakyl hitw ptdleeed cutrarnilllae roesst fo K+. Three si slao osmocti eurdsisi that dsela ot neecsrdai +K lsos ni het ueinr dan alott odyb +K nilde.peto The iuqtonse sask hatt is mots kliyel ot seederca twhi sulnini hey:aprt esrmu uaptismos ritcoonnectan wlil reesdcae as +K si onw ecagenxdh for +H nisdei het e.lcl

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cienfuegos  dAoaldtini WU ufn facst rirndageg sutoPmsia nad DK:Au es otucain ingvgi uslnini dna IV lfdsui ot dedyrtehda hlgmeirpyccey ecseaub i rocesf K ni ecsll gnaiscu afst escreaed fo axeclurarltel s,oPaimtus sthu igve K moppaeetslinntu enev wenh rsmeu K ealedvet +3
linwanrun1357  Wyh ienru K+ sdoe ton aeer?escd +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 eegra hatt Srmeu K esecrade is het btteer nwesar, utb dnu'olwt irUen K saol dsreeeca coen dbolo gaurs oegs wodn hiwt nlunsii atnetrtem ie.(. istcoom usridsie olwdu ?ee)nssl

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