PSY 209 EXAM 3P ACTUAL QUESTIONS AND
ANSWERS LATEST UPDATED 2024/2025
(GRADED A+)
MeiosisD-DcorrectDanswer-
aDspecialDprocessDofDcellDdivisionDthatDreducesDtheDchromosomeDnumberDinDhalfDduringDconception,Dfusin
gDgametesDandDformingDaDdiploidDzygoteD(howDgametesDform)
layersDofDtheDdevelopingDembryoD-DcorrectDanswer-ectoderm,Dmesoderm,Dendoderm
WhatDdoesDtheDectodermDbecome?D-DcorrectDanswer-nervousDsystemDandDskin
WhatDdoesDtheDmesodermDbecome?D-DcorrectDanswer-somaticDnervousDsystemD(muscle)DandDskeleton
WhatDdoesDtheDendodermDbecome?D-DcorrectDanswer-LiningDofDtheDinternalDorgansD(viscera)
NeuralDPlateD-DcorrectDanswer-flatDareaDonDectodermDofDdevelopingDembryo,DbecomesDneuralDgroove
NeuralDGrooveD-DcorrectDanswer-
ShallowDmiddleDgroove,DbetweenDneuralDfoldsDofDembryum,DbecomesDneuralDtube
NeuralDTubeD-DcorrectDanswer-
WhatDtheDneuralDgrooveDformsDintoDafterDaroundD22Ddays,DfluidDfilledDtubeDwhereDtheDcentralDnervousDsys
temDdevelopsDfromD-DaDbigDproblemDifDitDdoesn'tDclose
WhatDhappensDifDneuralDtubeDdoesn'tDformDwell?D-DcorrectDanswer-
BabyDcouldDgetDdisorderDcalledDanencephaly,DwhereDtheDanteriorDbrainDdoesn'tDfromDcorrectly,DorDspinaDb
ifadaDifDtheDposteriorDpartDdoesn'tDfoldDcorrectly
, 6DMajorDstepsDofDneuralDdevelopmentD-DcorrectDanswer-
Neurogenesis,DcellDmigration,Ddifferentiation,DprocessDoutgrowthDandDsynaptogenesis,DneuronalDcellDdeat
h,DsynapseDrearrangement
WhenDandDwhereDareDneuronsDborn?D-DcorrectDanswer-
NeuronsDmostDareDcreatedDinDtheDearlyDstagesDofDbrainDdevelopment,DbutDareDcreatedDthroughoutDlifespa
n.DBornDinDtheDprefrontalDcortex,Dhippocampus,DandDolfactoryDbulbs
WhatDcanDincrease/decreaseDneuronDbirthDinDadultDanimalsD-DcorrectDanswer-
Exercising,DnewDenvironments,DandDsocializationDcanDincreaseDneuronDbirth,DwhileDdrugsDsuchDasDalcoholD
orDMDMADcanDdecreaseDthem
HowDcanDweDdetectDnewbornDneurons?D-DcorrectDanswer-
nucleicDacidDisDtaggedDwithDaDlabelDandDinjectedDatDspecificDstagesDofDlife.DWhenDyouDcanDseeDtheDlabeledD
cells,DyouDknowDtheyDwereDborn.DAlso,DspecialDneurogenesisDmarkerDcalledDBrdUDisDtaggedDwithDaDfloresc
entDprobeDsoDyouDcanDseeDneurogenesisDoccurDinDrealDtime
WhereDdoDneuronsDgoDafterDbirthD-DcorrectDanswer-
UsingDcellDmigration,DtheyDtravelDviaDglialDradialDcells,DawayDfromDventricularDzoneDtoDcorticalDplate,DthenD
movingDtoDtheirDintendedDdestination
WhatDkindDofDchangesDdoDcellsDundergoDinDdifferentiationD-DcorrectDanswer-
TheyDundergoDchangesDinDgeneDexpression,DleadingDtoDstructuralDandDfunctionalDchangesDthatDmakesDthe
m,DforDexample,DlikeDaDneuron.DInDthisDcase,DtheyDwouldDformDneuritesD(DaxonsDandDdendrites)Detc."
3DkindsDofDdifferentiationD-DcorrectDanswer-CellDautonomousDmanner,DneuralDenvironment,DstemDcells
TypesDofDcellsDformedDinDdifferentiationD-DcorrectDanswer-
Neurons,DglialDcells,DpyramidalDcells,Dinterneurons
CellDautonomousDmannerD-DcorrectDanswer-
CellsDdevelopDindependentDofDneighboringDcells,DdestinedDtoDbecomeDthatDtypeDofDcell
ANSWERS LATEST UPDATED 2024/2025
(GRADED A+)
MeiosisD-DcorrectDanswer-
aDspecialDprocessDofDcellDdivisionDthatDreducesDtheDchromosomeDnumberDinDhalfDduringDconception,Dfusin
gDgametesDandDformingDaDdiploidDzygoteD(howDgametesDform)
layersDofDtheDdevelopingDembryoD-DcorrectDanswer-ectoderm,Dmesoderm,Dendoderm
WhatDdoesDtheDectodermDbecome?D-DcorrectDanswer-nervousDsystemDandDskin
WhatDdoesDtheDmesodermDbecome?D-DcorrectDanswer-somaticDnervousDsystemD(muscle)DandDskeleton
WhatDdoesDtheDendodermDbecome?D-DcorrectDanswer-LiningDofDtheDinternalDorgansD(viscera)
NeuralDPlateD-DcorrectDanswer-flatDareaDonDectodermDofDdevelopingDembryo,DbecomesDneuralDgroove
NeuralDGrooveD-DcorrectDanswer-
ShallowDmiddleDgroove,DbetweenDneuralDfoldsDofDembryum,DbecomesDneuralDtube
NeuralDTubeD-DcorrectDanswer-
WhatDtheDneuralDgrooveDformsDintoDafterDaroundD22Ddays,DfluidDfilledDtubeDwhereDtheDcentralDnervousDsys
temDdevelopsDfromD-DaDbigDproblemDifDitDdoesn'tDclose
WhatDhappensDifDneuralDtubeDdoesn'tDformDwell?D-DcorrectDanswer-
BabyDcouldDgetDdisorderDcalledDanencephaly,DwhereDtheDanteriorDbrainDdoesn'tDfromDcorrectly,DorDspinaDb
ifadaDifDtheDposteriorDpartDdoesn'tDfoldDcorrectly
, 6DMajorDstepsDofDneuralDdevelopmentD-DcorrectDanswer-
Neurogenesis,DcellDmigration,Ddifferentiation,DprocessDoutgrowthDandDsynaptogenesis,DneuronalDcellDdeat
h,DsynapseDrearrangement
WhenDandDwhereDareDneuronsDborn?D-DcorrectDanswer-
NeuronsDmostDareDcreatedDinDtheDearlyDstagesDofDbrainDdevelopment,DbutDareDcreatedDthroughoutDlifespa
n.DBornDinDtheDprefrontalDcortex,Dhippocampus,DandDolfactoryDbulbs
WhatDcanDincrease/decreaseDneuronDbirthDinDadultDanimalsD-DcorrectDanswer-
Exercising,DnewDenvironments,DandDsocializationDcanDincreaseDneuronDbirth,DwhileDdrugsDsuchDasDalcoholD
orDMDMADcanDdecreaseDthem
HowDcanDweDdetectDnewbornDneurons?D-DcorrectDanswer-
nucleicDacidDisDtaggedDwithDaDlabelDandDinjectedDatDspecificDstagesDofDlife.DWhenDyouDcanDseeDtheDlabeledD
cells,DyouDknowDtheyDwereDborn.DAlso,DspecialDneurogenesisDmarkerDcalledDBrdUDisDtaggedDwithDaDfloresc
entDprobeDsoDyouDcanDseeDneurogenesisDoccurDinDrealDtime
WhereDdoDneuronsDgoDafterDbirthD-DcorrectDanswer-
UsingDcellDmigration,DtheyDtravelDviaDglialDradialDcells,DawayDfromDventricularDzoneDtoDcorticalDplate,DthenD
movingDtoDtheirDintendedDdestination
WhatDkindDofDchangesDdoDcellsDundergoDinDdifferentiationD-DcorrectDanswer-
TheyDundergoDchangesDinDgeneDexpression,DleadingDtoDstructuralDandDfunctionalDchangesDthatDmakesDthe
m,DforDexample,DlikeDaDneuron.DInDthisDcase,DtheyDwouldDformDneuritesD(DaxonsDandDdendrites)Detc."
3DkindsDofDdifferentiationD-DcorrectDanswer-CellDautonomousDmanner,DneuralDenvironment,DstemDcells
TypesDofDcellsDformedDinDdifferentiationD-DcorrectDanswer-
Neurons,DglialDcells,DpyramidalDcells,Dinterneurons
CellDautonomousDmannerD-DcorrectDanswer-
CellsDdevelopDindependentDofDneighboringDcells,DdestinedDtoDbecomeDthatDtypeDofDcell
