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NBME 21 Answers

nbme21/Block 4/Question#25 (reveal difficulty score)
An 80-year-old woman cannot concentrate her ...
2.0 🔍 / 📺 / 🌳
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 +33 
submitted by mcl(667),
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sniooP iyv retgsirg a tpye IV tityeshpyerivnsi ti(daeemd yb T e)clls; nyol one fo the senrwa ceoihcs nosmtnie T .ellcs


 +24 
submitted by flashvoyger(24),
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The toqsnuei si niaskg you owh cuhm rweat ustm eth nowma atek in ot tininmaa teh esma li.tyoaolsm hTis oawnm seatk ni 045 Osmm fo ltoseu erp yda. Thsi si a tuni of mrnutmeaees -- hkitn of ti elki agr.ms

For erh to keep het saem otmsloiyal hse mstu terexec 054 mmOs rpe da.y ehT lyno yaw orf her ot erexcte teh tousel si vai eth ndekis.y Teh nyol wya ofr rhe iydsekn ot ectrxee 054 sOmm is fi yhte xcretee 1 etilr fo aetrw os.la hsTi is hte amx trnetioncocna htat ehr niysdke anc oerc.upd r(He dkiensy aer nto owr“fuple oenhgu” ot meka ehr ureni any omer ctcerodanten ntah ).thta

hTis anowm is lsoa oginls htraneo rilte fo trawe to scef,e egsainwt dan ortas.ipnier hiTs si eht sbilneenis“ ertaw sl.so” tahT mnsea if seh nsoilg 1 eltir fo tewra ot waes,t pitnsaerior and eefcs rep dya puls 1 rtlei of rweta ot eiurn (eacseub hes nesde ot ivsldeos reh oltesu ni )ts,ehoi!ngm ofr rhe bdool ot ysat the mesa loml,aiysto she smtu rplacee eht wtear seh ostl shtu stu,m at mnimimu, dnikr 2 sitelr fo traew pre a.dy

jean_young2019  great lTahexpontikan!an uo!y +  
unknown001  shit si awy eesari dan smnoreihp.eclbe i;tp adre flash yvregsao fitrs, dan ehtn rubsh utorghh usoetc.alpn +  



 +23 
submitted by cantaloupe5(87),
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e’sSh tiniagkn 045 sOmm pre yad so esh dnsee to reectxe 450 smmO epr dya ot anntiima buulmrqi.iei uYo ct’an ujst eexrect ms’smO by ehtsevlmes -- eyht avhe to be olviesdsd in osme moatnu fo ew.atr

’seLt asy uyo exrtece 504 Omsm htwi 500 Lm of rtaew -- hatt ansem ruyo eidknsy aer tagointecnnrc einur ot:

405 Omms ÷ 005 mL = 900 smLm/O

Btu eht mxuamim siht dyas’l iedsnky anc reeoncatnct ireun to si 540 O,sLmm/ os seh sah to teerxce rome etawr to etg ti that tl.eidu tahT anutmo of tawre is 1 ,L eueascb 054 O/m1sm L = 450 msmLO/.

wNo erh’tse ngthino gsoipntp reh form tincergex hte 405 sOmsm ni na eevn mroe ildeut rnuie -- orf lemxepa if ehs arndk na arxet L fo weart eno da,y eht iydskne lduco get ird of that trxea L whit eht easm motuan of 450 smOm by ugtidlin teh euinr ot 405 smOm ÷ 2 L = 225 ms/OLm. uBt hte oinqtseu sksa orf hte imunmmi otmaun of ewtar -- hhwci si 1 L by the edyniks +( 1 L frmo eht teohr fufts orf a lotta fo 2 )L.

shieldmaiden  ahnkT God oyu pexneladi erewh atht erlit maec fmor esecuba Fhrsogvaely tsju ootk it tou a amigc tha dna I saw mlocpylete ostl +  
skonys  lduoW be sraet be ueiddcln ni eth snbeneiIsl trWae slo?s +3  
skonys  *my .:( +  
ankigravity  o,S sa roaehnt m,lpaeex fi ehs tkoo in 009 lsyomdOa/m fo ule,tos hse wdlou nede to nrtaeiu 2 L ot aecrl that + 1 L fmro hte ohetr ftufs fro a latto of 3 L? +  



 +15 
submitted by burningmoon(18),
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r(a)Wet1 1gK 1teLwra= rOgs mwe0/ta5mk4 w/LsrO5me=ma0t4 nwetai Mr HO2 eedend ot sisdevol 540 euotsl yb dkyein is L1 rWeat awr2et)( Orhet scfee( et oa:=tll1Ta.)L w)(a+1ert r=Ltaw)2e2(

ali_hassan  hsti is hwat i nedeed +  



 +10 
submitted by yotsubato(1189),
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shiT unioqest si usdt.ip Wtrae eiknta orf a aytehlh vailiddinu is 2.0 L a a.yd




 +7 
submitted by madeforupvoting2(16),
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oT ianatmin plasam myisloalto t&;-g deNe ot xtceyal areepcl all eht lisufd tsol in hte ady

hSe tncaon roaectnncet ienru baeov 540 gm/mksO , so hte iimmnmu noumat fo wetra eirquedr ot be xdreecet yb ekysndi si 1 ot( ecterxe teh 540 msOm she tcaeusclmua epr a)dy. ehT iimmunm iotxecern ewtar requdier is lcyrniaeses ta max nncia;tonrcote fi yuo rewe to yas odcrupe uteldir nriue, sya 5,2gmkO/2ms itsh udwol errqeui 2 L fo era.wt The ieonuqts sntaw het muiimmn esbslopi trewa oelvmu, so ew ussmae e’shs gtocnticenarn ot het .axm

1 L slosse from nkidye + 090 mL nnseiesilb + 100 mL in awtes nad fesec = L2 elsoss >- ndee to intgse 2 L fo tawre to eracpel.

jesusisking  So epll,ufh khtan uy!o +  



 +1 
submitted by misrao(5),
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Can esnomeo lneapix teh tcanrloioer bteewen 540 maomO/sldy and deeignn ot txeecer 1 L fo trea?w Thakns

trazobone  Tshi is ym scodne mtie donig htis snuitqeo TY .VCOID ehT iintdoenfi of na msO si the bnemru fo oosemsl of suelto erp etilr fo ole.ntsv ehT tsem tlsle oyu het tihghes esh nca neraneoctct rhe eniur is 450 O/mkoslmg O,H2 dna hse kaste in 405 sol/md.amyO eSh soal selso 0100 mL mrof ,awste e,efcs ect.. eTh oslmmO ravblsaie era NTO dateerl to het 1000 .Lm tI si going to akte 1 itlre to etcnnrctaeo hatt 450 Omlsmo enuir, dan esh saol seslo a eerasapt edtrenual 1 iltr.e Ttoe,rheg teh inmmuim matnuo fo 2HO deneed si niggo ot eb 2 irle.st +  



 +1 
submitted by trazobone(95),
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hsiT si ym eoscdn mite dniog htsi equotins TY D.IVOC The ofinidnite of na smO si hte umnber of ssoeoml of luoest epr eritl fo tevn.los Teh tesm seltl yuo hte sihhetg esh can neectaorctn reh rniue is 450 glmks/omO ,2HO nda seh kaste ni 450 mO.yosmlda/ eSh salo sosle 1000 mL rmfo t,easw efce,s ..ect Teh omOmls lvsraibea era NOT rteadle to teh 0010 Lm. tI si oggni ot tkae 1 ielrt ot enttcecnroa atth 450 olmOms u,irne and hse laos sseol a asatpeer arelneutd 1 rt.eil ,rgTeoeht teh inuimmm oanmtu fo HO2 ddeene is gnoig to eb 2 lrs.ite




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