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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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caeff;kcb@loe

Isiulnn esdo lapy a elro in gnnbrigi bcak K+ tino lclse vai loamniduto of H+/K+ ahnecexg. siTh is eaesbcu it hpels ot searsdd eht tidocaociket saett fo hte a.ttienp yB ignibnrg Hp rsecol to seblnea,i erhte is erurtn fo +K iton hte lcse,l hwlie +H mcoes acbk uto fo hte eclsl.

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an_improved_me  ,weoeHrv uyo rea ihr,gt ni htat oot my ,ngodkewle tath is tno het amin awy siunnil lnsuiefnec K;+ ti si oerm avi het aePAaNTs as you avhe one.miednt +1


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submitted by โˆ—nala_ula(127)
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nI ietdbaci soad,ciotskie ehetr is eradeincs acid in eth xrtrlelulaaec ea.scp oAirdcgcn ot FA erhte is a nuelracltlars tfish edu ot derdseace lnsinui that daels to mroe H+ tirengen eth ecll ni nxeehgac ofr .K+ sThi ldsea ot kamihlyepera hwit eeddtepl iarlrnluatcle esrtso of K+. erheT is laso ctsoiom sesuirid hatt leads ot aecnrised K+ ossl in hte rniue dan ttola body K+ ne.toledip The eoitnsuq akss ahtt is mtos kliyel ot aceeserd twih ilsinnu reyp:ath smeur oimusptas raitconnnecot lwil eceedsra sa K+ is nwo hexdgeacn for H+ eniids eht elcl.

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cienfuegos  idnlioatAd UW fun fscat gierrdgan osPmiatsu dan uKsAe:D anuocit ggiivn isuilnn nad IV ilsufd ot ryddedteah rghycmipylece eeaucsb i csorfe K in lecls aginucs fats rdeecsae of tecallrrelaux uPiatss,om uhst eigv K emopuespannttil neve whne rsmue K eeveldta +3
linwanrun1357  yWh nriue +K dsoe otn ?ereeasdc +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 egare ttah uermS K aseeredc si hte etrtbe swr,aen ubt uwodt'nl nrUei K losa reecasde neco blodo ugsra egos dwno ihwt nuinisl tenreamtt i(..e ctoomis ursiieds owuld e?esls)n

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