part Questions And Answers
Azcommonzclasszofzanti-
epilepticzdrugszworkszbyzenhancingzthezactivationzorzionzconductancezofzwhichztypezofzrece
ptor?z-zCORRECTzzANSWER-GABA
Azlargerzbrainzforzbodyzsizezmayzprovidezrelativelyzmorezintelligence,zbutzitzwouldzdozsozatzt
hezexpensezofzprocessingzspeed.zThatzis,zlongerzdistanceszbetweenzneuronszinzthezbrainzw
ouldzresultzinzslowerzprocessing.zHowzhavezhumanszevolvedztozspeedzcommunicationzacr
osszdistances?z-zCORRECTzzANSWER-axonszbecomezheavilyzmyelinated
AzmajorzimplicationzofzHubelzandzWiesel'szfindingszofzanzocularzdominancezcriticalzperiodzis
zthatzchildrenzwithzanzeyezthatziszvisuallyzimpairedzorzobstructedzthroughzthezcriticalzperiodz
willz-zCORRECTzzANSWER-
permanentlyzlosezfunctionalzvisionzinzthezimpairedzeyezandzhavezimpairedzdepthzperceptio
n
Azmusclezfiberziszinitiallyzinnervatedzbyz2zmotorzneurons.zWhatzwouldzhappenzifzyouzspecifi
callyzblockedzvoltage-
gatedzNa+zchannelszinzjustzonezofzthezmotorzneuronszwithztetrodotoxinz("motorzneuronzT")z
butznotzthezotherz("motorzneuronzC")?z-zCORRECTzzANSWER-
ThezsynapsezwithzmotorzneuronzCzwillzremainzandzthezsynapsezwithzmotorneuronzTzlost
Anzexcesszofzdopaminezreleasedzintozthezbasalzgangliazwouldzhavezwhichzofzthezfollowingz
effectszonzmovement?z-zCORRECTzzANSWER-
Makezitzmorezdifficultztozinhibitzunwantedzmovements
Animals,zandzhumans,zcanzbezconditionedztozexhibitzazfearzresponseztozazpreviouslyzinnoc
uouszstimulizifzitzhaszbeenzpairedzwithzsomethingzunpleasant,zlikezazshock.zInzwhatzareaziszt
hiszmemoryzapparentlyzformedzandzstored?z-zCORRECTzzANSWER-amygdala
Atzwhatzageziszthezincidencezofzseizureszthezlowest?z-zCORRECTzzANSWER-25
Atzwhatzlocationszareznewlyzbornzneuronszfoundzinzadultzprimates?z-
zCORRECTzzANSWER-Onlyzinzthezhippocampuszandzolfactoryzbulb
, ByzwhatzmechanismzdoeszcGMPzaffectzmembranezpotentialzinzphotoreceptors,zsuchzaszco
nes?z-zCORRECTzzANSWER-
causeszcertainzchannelszselectivezforzNa+zandzCa2+ztozopen
Cellszfromzthezneuralzcrestzarezprecursorsztozwhichzofzthezfollowing?z-
zCORRECTzzANSWER-dorsalzrootzganglia
Certainzformszofzthezgeneszforzcatherine,zneurexins,zandzneuroliginszhavezbeenzfoundztozb
ezassociatedzwithzanzincreasedzriskzforzautism.zBasedzonzthiszinformationzautismzmayzbezc
ausezbyzabnormalz-zCORRECTzzANSWER-synaptogenesis
Damageztozthezcerebellumzwouldzmostzlikelyzcausez-zCORRECTzzANSWER-
jerky,zimprecisezmovements
Directzpathwayzthroughzthezbasalzgangliaz-zCORRECTzzANSWER-pathwayzfromzcortexz---
zcaudate/putamenz----globuszpallidzus,zinternalzsegment
Duringzhumanzdevelopment,zifzthezanterior/rostralzneuralztubezdoesn'tzcompletelyzclose,zw
hatzwillzbezthezoutcomezforzthezchild?z-zCORRECTzzANSWER-anencephaly
Forzusztozbezconsciouszofzsomethingztouchingzourzskin,zazsensoryzafferentzhasztozconveyzth
ezsensezofzmechanicalztouchztowardszthezbrain.zWherezdoeszthiszsensoryzafferentzformzitszf
irstzsynapsez(neededztoztransmitzinfoztozbrain)?z-zCORRECTzzANSWER-brainstem
Howzmanyzsynapseszdozyouzhavezinzyourzcerebralzcortexznowzcomparedztozwhenzyouzwer
ez5zyearszold?z-zCORRECTzzANSWER-fewerzsynapses
Ifzilluminationziszincreasedzonzonlyzonezedgezofzanzoff-
centerzganglionzcell'szreceptivezfieldz(partzofzsurroundzonzonezside)zhowzwillzitszratezofzactio
nzpotentialzfiringzchange?z-zCORRECTzzANSWER-increasedzfiringzrate
Ifzyouzslowlyzinsertedzazrecordingzelectrodezintozthezprimaryzvisualzcortex,zperpendicularztoz
thezsurface,zandzrecordedzfromzeachzlayerzaszyouzwentzprogressivelyzdeeper,zwhatztypezofz
responsesztozvisualzstimulizwouldzyouzexpectztozseezinzeachzlayer?z-
zCORRECTzzANSWER-cellszinzeachzlayerzwouldzrespondzsimilarlyztozvisualzstimuli
Inzcertainzgeneticzdisorders,zthezvoltagezgatedzK+zchannelszhavezalteredzvoltagezdepende
nce,zwherebyzitztakeszgreaterzvoltagezincreaseszinzorderztozopenzthezchannelsztozazsimilarze
xtentzaszthezwildztypezchannels.zWhichzofzthezfollowingzchangeszwouldzoccurzwithzthiszmuta
ntzchannel?z-zCORRECTzzANSWER-
Greaterzamountszofzthezneurotransmitterzwouldzbezreleasedzwithzeachzactionzpotential
Inzrelationztozotherzretinalzganglionzcells,zthezPzganglionzcellsztendztozhavez-
zCORRECTzzANSWER-finerzspatialzresolutionzandzcolorzselectivity