Kim! Hi! It’s your dad!👋 ▪ Khalilah, I’m proud of you for taking a risk for your dream.Everyone’s explanations tend to be so on-point, and the commiseration makes me feel better, too!Hi Hira. You are doing a good job!Hey Shariq! Doing a great job!                       want to add a fly-by? email us! 😊
share email twitter ⋅ join discord whatsapp(2ck)
Free 120  NBME 24  NBME 23  NBME 22  NBME 21  NBME 20  NBME 19  NBME 18  NBME 17  NBME 16  NBME 15  NBME 13 
search for anything NEW!
NBME 21 Answers

nbme21/Block 4/Question#25 (reveal difficulty score)
An 80-year-old woman cannot concentrate her ...
2.0🔍,📺
tags:

Login to comment/vote.


Tutor box

Members from the Leaderboard offering 1-on-1 help: Want to be listed here? Email us!

 +22 
submitted by cantaloupe5(81),
unscramble the site ⋅ remove ads ⋅ become a member ($39/month)

’ehsS kniigant 540 mmsO rep day os she nsdee to ceteexr 504 mmOs erp day ot atnmiian .eumibliirqu oYu ’antc stju ceretxe ms’smO yb teevhelssm -- htye eavh ot eb idoedssvl in oesm oanutm of wre.ta

et’sL ays oyu ceterex 054 sOmm twih 050 Lm of teraw -- ttah emans your sikedyn rea tnctnreaignoc ueirn t:o

045 msOm ÷ 050 mL = 009 /mOsLm

utB hte mxmiuma siht ’aysdl nsyiked can nnecaroectt einru ot si 045 LmmsO/, os ehs sha to cerxtee more trewa ot tge it thta ilte.du That tonmua fo awrte is 1 ,L esbuaec 450 1smOm/ L = 054 smOm./L

wNo hse’tre inhnotg ipogpstn reh fmro cregxiten teh 054 smOms in na vnee rmoe iudlet urnei -- fro alemexp if esh nakdr na terax L fo trawe oen dy,a het edynksi ulodc egt rdi fo htat trxea L twhi het esma tumnoa of 405 mmsO by guinltdi teh urnei to 540 smOm ÷ 2 L = 225 /OsmLm. Btu the euqonist kass fro het nimumim tmuona of tawer -- ihhwc si 1 L by eth dykisen +( 1 L from eht ohrte ffust orf a toatl fo 2 L).

shieldmaiden  Thank God you explained where that liter came from because Flashvoyger just took it out a magic hat and I was completely lost +  
skonys  Would be tears be included in the Insensible Water loss? +1  
skonys  *my :.( +  



 +22 
submitted by flashvoyger(22),
unscramble the site ⋅ remove ads ⋅ become a member ($39/month)

heT oneitqsu is nksgai uyo woh chmu rtawe sumt the omwan etka in ot nmaiinta hte amse laotmsi.ylo ihsT awomn ketas in 054 Omms of tulseo erp a.yd sTih is a intu fo tsanummreee -- ihktn of ti elki .sgmra

roF reh to peke the esma oltmolisya hse smtu eerctex 450 Osmm pre da.y hTe onyl awy rfo hre ot ceerext eth tuesol is aiv eth isk.yedn eTh yoln yaw fro hre dyisnke ot cretxee 540 Osmm is if yhte cxereet 1 terli fo ewart osla. Tish si het mxa incotntaorcen thta hre snkdyei nca druo.ecp r(He ekndsyi ear otn feporlwu“ o”guenh to aekm her niuer nay moer naccenertotd anth )th.ta

siTh manwo si osal glnosi ortehna rleit of werat ot f,ecse agtnewsi dna isrpnteoiar. hTsi is eth nl“eeiisnsb aewtr ”o.lss tTah sname fi hse noligs 1 irlet of wtrae to teaws, isepitraorn nda sfeec pre ady lusp 1 elirt fo weatr to iuren bac(seeu hes esned to sodlsevi reh stloeu ni sgho)!,ietnm ofr reh lobdo ot asyt the emsa smolo,tliya esh stum creepla eht ratew hes tlos uths tms,u at nmmiui,m iknrd 2 lretsi fo eawrt pre y.ad

jean_young2019  great explanation!Thank you! +  



 +13 
submitted by burningmoon(15),
unscramble the site ⋅ remove ads ⋅ become a member ($39/month)

Wr1t)e(a gK1 teL=1wra 0kesar4/gmtOm 5w 0O4=wm/smLeatr5 Meirtwna 2OH ededne to vdeisols 045 sutole by kdieny is 1L r2Wara(twt)ee rethO e(ecsf te =1tl)ol:aa.LT are+tw1() r2)tL=2a(we




 +10 
submitted by yotsubato(1088),
unscramble the site ⋅ remove ads ⋅ become a member ($39/month)

hsiT nusqtioe si ut.disp rWaet aietnk rof a tlhehay divuadliin is 20. L a dya.




 +5 
submitted by madeforupvoting2(14),
unscramble the site ⋅ remove ads ⋅ become a member ($39/month)

oT tnaiainm mlaasp aloymlstio -g&t; edNe to cltaeyx elcraep all eth sfduli tlos in teh yad

eSh ctnnoa trnneetccoa urine voeba 054 mOmgk/s , os the unimmim motuna of twaer rrqudeie to be xctereed yb eidsykn is 1 (to etexcer eth 504 smOm hes taecumuslca erp ayd). ehT imnimum eixncetor wtera eirruqed si nceyrsieasl at amx acoi;ncetnntor if you weer to ysa pocerdu erlidtu renu,i ysa 52gm2,s/kmO shti udlwo ieuqrre 2 L fo tew.ra Teh ueitqons tnasw the niummmi lsipbeos erawt ,veomlu os we essamu hsse’ ctornagntenic to eht mx.a

1 L sossle fmor iynedk + 900 mL liseensnbi + 001 Lm ni ewats and efsec = 2L ossesl t-;&g dene ot segnit 2 L of tearw ot eca.lrep

jesusisking  So helpful, thank you! +  



 +1 
submitted by misrao(3),

Can someone explain the correlation between 450 mOsmol/day and needing to excrete 1 L of water? Thanks

trazobone  This is my second time doing this question TY COVID. The definition of an Osm is the number of osmoles of solute per liter of solvent. The stem tells you the highest she can concentrate her urine is 450 mOsmol/kg H2O, and she takes in 450 mOsmol/day. She also loses 1000 mL from sweat, feces, etc.. The mOsmol variables are NOT related to the 1000 mL. It is going to take 1 liter to concentrate that 450 mOsmol urine, and she also loses a separate unrelated 1 liter. Together, the minimum amount of H2O needed is going to be 2 liters. +  



 +0 
submitted by trazobone(59),

This is my second time doing this question TY COVID. The definition of an Osm is the number of osmoles of solute per liter of solvent. The stem tells you the highest she can concentrate her urine is 450 mOsmol/kg H2O, and she takes in 450 mOsmol/day. She also loses 1000 mL from sweat, feces, etc.. The mOsmol variables are NOT related to the 1000 mL. It is going to take 1 liter to concentrate that 450 mOsmol urine, and she also loses a separate unrelated 1 liter. Together, the minimum amount of H2O needed is going to be 2 liters.