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PNB Exam 2 UConn (2)| PNB 2264 Exam 2 Practice| exam set with correct answers
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PNB Exam 2 UConn (2)| PNB 2264 Exam 2 Practice| exam set with correct answersPNB Exam 2 UConn (2)| PNB 2264 Exam 2 Practice| exam set with correct answersPNB Exam 2 UConn (2)| PNB 2264 Exam 2 Practice| exam set with correct answersPNB Exam 2 UConn (2)| PNB 2264 Exam 2 Practice| exam set with correc...

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  • November 6, 2024
  • 19
  • 2024/2025
  • Exam (elaborations)
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  • pnb exam 2 uconn 2 pnb 2264 exam 2 practice ex

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PNB Exam 2 UConn (2)| PNB 2264 Exam
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2 Practice| exam set with correct answer
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musclehdhashd___________hdpotentialhdmeaninghdithdishdablehdtohdpasshdahdcurrenthdthroughhd-
hdcorrecthdanswers-bioelectric/electric



plasmahdmembranehdishdresponsiblehdforhdkeepinghdchargedhdparticleshd_______hdfromhdeachhdotherhd-
hdcorrecthdanswers-separate



exampleshdofhdintegralhdmembranehdproteinshd-hdcorrecthdanswers-channels/ionhdtransporters
Vmhdishdpotentialhdinsidehdthehdcellhdrelativehdtohdthehdpotentialhd_______________hdexpressedhdashdahd
voltagehd-hdcorrecthdanswers-outsidehdthehdcell


alwayshddescribinghdintracellularhdtohdextracellular
voltagehdgatedhdmeans...
ligandhdgatedhdmeans...hd-hdcorrecthdanswers-electricallyhdactivated
chemicallyhdactivated
increasinghdpermeabilityhdallowshdthathdionhdtohdmove__________________.hd-hdcorrecthdanswers-
downhdtheirhdconcentrationhdgradient
K+hdconcentration:hd________hdinhd_______outhd-hdcorrecthdanswers-100hd;hd5
Na+hdconcentration:hd_____inhd______outhd-hdcorrecthdanswers-10hd;hd100
Cl-hdconcentration:hd_______inhd______outhd-hdcorrecthdanswers-10hd;hd105
Ca2+hdconcentration:hd______inhd______outhd-hdcorrecthdanswers-0.001hd;hd1.2
ifhdallhdchannelshdwerehdnonhd-
selective,hd_________hdwouldhdalwayshdoccurhdwithhdnohdgradientshdmeaninghdnohdmembranehdpotent
ialhdandhdexcitablehdtissueshdwouldhdnothdcontracthd-hdcorrecthdanswers-equilibrium

,onlyhdoccurshdifhddead
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althoughhdsomehdchannelshdarehdselectivehdonlyhdforhd(+)hdonlyhdandhdtransporthdalreadyhdoccurred,hdbe
causehdoppositehdchargeshdattracthdandhdtherehdarehdmorehd(-
)hdinsidehdthehdcellhdvhd(+),hdsomehd(+)hdcellshdthathdmovedhdouthdbyhdconcentrationhdgradienthdwithhdactu
allyhdre-enterhdthehdcellhdtohdbalancehdouthdchargehd-hdcorrecthdanswers-
equilibriumhdpotentialhdforhdanhdionhd(Ex)hdishdthehd_________________hdathdwhichhdthehd__________
______hdandhd___________forceshdarehdequalhdandhdoppositehd-hdcorrecthdanswers-
membranehdpotential
concentrationhdgradient
electrical


nethdflux=0
Equilibriumhdishddifferenthdforhdeachhdion.hd(T/F)hd-hdcorrecthdanswers-true
despitehdmovementshdofhdions,hd________hdofhdthosehdionshddon'thdchangehdinsidehdofhdyourhdbodyhdbut
hdonlyhdoccurshdinhdahdlabhdorhd@deathhd-hdcorrecthdanswers-concentrations



cellhdishdpermeablehdtohd_____________hdathdahdtimehd-hdcorrecthdanswers-onlyhd1hdion
inhdahdquestionhdlikehd"whathdwillhdhappenhdtohdK+hdconcentrationhdifhdNa+hdincreaseshdintracellularlyhdfr
omhd100-500mM"hdthehdanswerhdwouldhdbe....hd-hdcorrecthdanswers-
NOTHINGhdbecausehdthehdmembranehdishdonlyhdpermeablehdtohdonehdionhdathdahdtime
biggerhdconcentrationhdgradienthd=hd__________hd-hdcorrecthdanswers-morehdionhdmovement
K+hdishd_____________hdthehdcellhdmeaninghdithdwillhdflowhd_________.hd-hdcorrecthdanswers-
higherhdinside
out
Na+hdishd________________hdthehdcellhdmeaninghdithdwillhdflowhd__________.hd-hdcorrecthdanswers-
higherhdoutside
in
Likehdsodium,hdCl-hdishd_______________hdthehdcellhdmeaninghdithdwillhdflowhd_______.hd-
hdcorrecthdanswers-higherhdoutside



in

, ifhdpermeabilityhdofhdanhdionhdincreases,hdVmhdwillhdmovehd_________hdEionhd-hdcorrecthdanswers-
towardshdthathdion'shdequilibrium
equilibriumhdishdaffectedhdbyhd____________hdinteractionshdandhd______________hdgradient.hd-
hdcorrecthdanswers-charge-chargehdinteractions



concentration
equilibriumhdwillhdbehdZEROhdifhdionshdarehd________.hd-hdcorrecthdanswers-
isotonichdbchdfollowinghdnersthdequation,hd1/1=1hdandhdlog1=0
relativehdExhdforhdions:
K+hdishd______________hd
Na+hdishdthehd__________hdconcetration
Cl-hdishdthehdsecondhd_________________hd-hdcorrecthdanswers-mosthdnegativehd(-75mV)
positivehd(+58mV)
secondhdmosthdnegativehd(-59mV)
Nersthdequationhdcalculateshd____________hdANDhdNOThd______________.hd-hdcorrecthdanswers-
equilibriumhdandhdNOThdmembranehdpotential
steadyhdstatehddoeshdnothdmeanhd_____________hdbuthdishdratherhddescribinghdnethdfluxhdashd_______.h
d-hdcorrecthdanswers-equilibrium



ZERO


forhdexamplehdwaterhdenteringhdandhdleavinghdahdbuckethdahdthehdsamehdtime
restinghdVmhdishdthehdcellhdmembranehdpotentialhdathdwhichhdthehd_________hdofhdthehdionshdishd______
__.hd-hdcorrecthdanswers-nethdflux
zero
___________hdpotentialhddetermineshdmembranehdpotentialhd-hdcorrecthdanswers-equilibrium
membranehdpotentialhdishddeterminedhdbyhdpotentialhdofhd______________hdpermeablehdionshd-
hdcorrecthdanswers-all



membranehdpotentialhdcanhdneverhdbehdmorehd+/-hdthanhdthehdmosthd+/-hd____________.hd-
hdcorrecthdanswers-equilibriumhdpotential



K+hdishdmost_____________hdpotential
Na+hdishdmosthd__________hdpotentialhd-hdcorrecthdanswers-negative

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