SECOND WEEK
- TheCytotrophoblast:
a. Cellshaveindistinctcellboundaries.
b. Cellshavemitoticfigures.
c. Consistsofmultilayerdcells.
d. Derivedfrom embryoblast
e. Nucleilieinapoolofcytoplasm
Ans:B - TheSyncytiotrophoblasthavefollowingcharacteristics:
a. Cellshaveindistinctcellboundaries.
b. Cellshavemitoticfigures.
c. Consistsofmultilayerdcells.
d. Derivedfrom embryoblast
e. Nucleilieinapoolofcytoplasm
Ans:A - Thegerm layerspresentattheendof2ndweekofdevelopmentare;
a. Ectoderm andendoderm.
b. Ectoderm,mesoderm andendoderm.
c. Epiblastandhypoblast.
d. Epiblast,mesoderm andhypoblast.
e. Epiblastandectoderm.
Ans:C - SecondaryChorionicvilluscontains:
a. Bloodvessels
b. Chorion
c. Cytotrophoblast
d. Mesodermalcore
e. Syncytiotrophoblast
Ans:D - Thefollowingstructureisformedduringthesecondweekofdevelopment
a. Bilaminargerm disc
b. Branchialarches
c. Genitalridge
d. Hearttube
e. Trilaminargerm disc
Ans:A - Thecharacteristicsofsyncytiotrophoblasts;
a.abundantmitoticfigures
b.multinucleated
c.prominentcellwall
d.prominentRER
e.uninucleated
Ans:B - Uteroplacentalcirculationstartsonday
a. 13-14
b. 7-8
c. 8-9
d. 9-10
e. 11-12
Ans:E
- On9thdayatab-embryonicpoleflattenedcellsoriginatefrom hypoblasttoform;
a.Blastocele
b.Chorioniccavity
c.Coelomicmembrane
d.Definitiveyolksac
e.Heuser’smembrane
Ans:E - Primaryvilliconsistof:
a. Columnsofcytotrophoblast
b. Columnsofcytotrophoblastsurroundedbysyncytium
c. Columnsofextra-embryonicmesoderm andTrophoblast
d. Columnsofsyncytiotrophoblast
e. Spiralarteriesand endometrialtissue
Ans:B - Theothernameforchorioniccavityis:
a. Chorionicplate
b. Exocoelomiccysts
c. Extra-embryoniccoelom
d. Extra-embryonicmesoderm
e. Intra-embryoniccoelom
Ans:C - Theneurentericcanalconnectstheamnioticcavitywith:
a. Chorioniccavity
b. Exocoelomiccyst
c. Lacunae
d. Uterinecavity
e. Yolksaccavity
Ans:E - Secondoryyolksacoriginatesfrom:
a. Ectoderm
b. Epiblast
c. Hypoblast
d. Mesoderm
e. Trophoblast
Ans:C - SecondaryChorionicvillus:containscoreof
a. Bloodvessels
b. Chorionlaeve
c. Cytotrophoblast
d. Mesoderm
e. Syncytiotrophoblast
Ans:D - Duringimplantationofzygote,followingisrequiredtopreventrejectionofzygotebymother’s
immunesystem
a.Autoimmuneresponseofbody
b.Depressionofimmunesystem
c.Excessivecellmediatedimmunity
d.Nochangeinimmunesystem
e.Shiftfrom celltohumoralmediatedimmunity
Ans:E
- Thefunctionofprogesteroneinfemalegenitaltractis;
a.Causefollicularruptureandovulation
b.StimulationofpitutorytosecreteLH
c.Thinningofcervicalmucustoallowpassageofsperm
d.Uterineendometrium entersproliferativephase
e.Uterineendometrium enterssecretoryphase
Ans:E - Theestrogenissecretedbythe
a.Follicularcells
b.Granulosacells
c.Leutincells
d.Thecaexternaandgranulosacells
e.Thecainternaandgranulosacells
Ans:E - Whenamaturegraffianfolliclebulgeonsurfaceofovaryitproducesaspotcalled
a.Corona
b.Corpus
c.Granule
d.Stigma
e.Theca
Ans:D - UndertheinfluenceofLHthegranulosacelldevelopapigmentandform
a.Corpusalbican
b. Corpusatreticum
c.Corpusgraviditatis
d.Corpusleuteum
e.Corpusluteum ofpregnancy
Ans:D
- Siteoffertilizationis;
a.Ampullaofuterinetube
b.Ovary
c.Peritonealcavity
d.PouchofDouglas
e.Uterinecavity
Ans:A - Thelacunarstageofembyoinsecondweekoccursonday;
a.8th
b.9th
c.10th
d.11th
e.12th
Ans:B - Onday11-12ofdevelopmentthefollowingeventtakesplace;
a.Establishmentofuteroplacentalcirculation
b.Formationodfamnioticcavity
c.Formationofumbilicalcord
d.Initiationoflacunarstage
e.Thedefectinendometrium iscoveredbyfibrincoagulam
Ans:A - ApatientcamewithH/Omissiedperiodforlast8weeks.Shedevelopedexcessivevomitingand
couldnottakeanythingorally.Onultrasoundfetalheartactivitywasnotdetected.Shewas
diagnosedashavingHydatidiform mole.Whichhormoneissecretedinexcessivelevelinthiscase?
a.Estrogen
b.FSH
c.HCG
d.LH
e.Progesterone
Ans:C
- Themesoderm surroundingtheyolksacis;
a.Intermediate.
b.Lateralplate.
c.Paraxial.
d.Parietal.
e.Splanchnic.
Ans:E
THIRDWEEK - Thesalientfeatureof3rdweekofdevelopmentis:
a. Developmentofextraembryonicmesoderm
b. Gastrulation
c. Primaryyolksacformation
d. Secondaryyolksacformation
e. Trophoblasticlacunae
Ans:B - Sacro-coccygealteratomasarethetumorsthatresultfrom:
a. Deficiencyofmiddlecraniofacialstructures
b. Insufficientmesoderm formation
c. Remainsofallantois
d. Remnantofnotochord
e. Remnantsofprimitivestreak
Ans:E - TheNotochordissignalingcenterforinducing
a. Axialskeleton
b. Buccopharyngealmembrane
c. Head&neck
d. Heart&pericardium
e. Neuraltube
Ans:A - Thefollowingstructureisformedduringthethirdweekofdevelopment
a. Bilaminargerm disc
b. Brachialarches
c. Genitalridge
d. Hearttube
e. Trilaminargerm disc
Ans:E - Neurentericcanal
a. Isformedbybreakingofbucco-pharyngealmembrane
b. Isformedincaudalpartofprimitivestreak
c. Ispresentinentirelengthofnotochordalprocess
d. Isprimitivecavityofneuraltube
e. Istemporarycommunicationb/wamnioticandyolksaccavities
Ans:E
- Ababywasbornwithalargeswellingintheareaoflowerback.Thediagnosisis:
a. Holoprosencephaly
b. Kartagener’ssyndrome
c. Sacrococcygealteratoma
d. Sirenomelia
e. Situsinversus
Ans:C - Atthecaudalendoftheprimitivesteak,ectoderm andendoderm meetatthe
a. Cloacalmembrane.
b. Coelom
c. Neuralgroove.
d. Notochord.
e. Notochordalcanal
Ans:A - RegardingthedevelopmentofNotochord,itsadultremnantis:
a. Annulusfibrosus
b. Neuraltube
c. Nucleuspulposus
d. Primitivenode.
e. Spinalcord
Ans:C - 3rdweekofdevelopmentischaracterizedby:
a. Establishmentofterminalvilli
b. Formationofchorioniccavity
c. FormationofYolksac
d. Gastrulation
e. Trophoblasticlacunaeformation
Ans:D - Aneonatewasbornwithalargeswellinginthelowerbackregion.O/Etheswellingshowed
multipletissueslikehair,muscle,gland.Thediagnosisis;
a.Holoprosencephaly
b.Kartagener’ssyndrome
c.Sacrococcygealteratoma
d.Sirenomelia
e.Situsinversus
Ans:C - Paraxialmesoderm isresponsiblefortheformationof:
a. adrenalmedulla
b. Boneandmuscle
c. Dermisofskin
d. Somites
e. urinarysystem
Ans:D - Themesoderm showingintraembryoniccoelom is;
a. Intermediate.
b. Lateralplate.
c. Paraxial.
d. Parietal.
e. Splanchnic.
Ans:B
- Atthecaudalendoftheprimitivesteak,ectoderm andendoderm meetatthe:
a. Cloacalmembrane.
b. Coelom.
c. Neuralgroove.
d. Notochord.
e. Notochordalcanal.
Ans:A - Initialmorphologicalchangepreparatorytogastrulationisformationof:
a. intraembryoniccoelom
b. notochordalprocess
c. prechordalplate
d. primitivestreak
e. primitivevilli
Ans:D - Theallantoiswhichisarudimentarystructureappearon16thday,isderivedfrom splittingofthe
lateralplatemesoderm form the:
a. Amnioticcavity
b. Intermediatemesoderm
c. Intraembryoniccoelom
d. Somites
e. Yolksac
Ans:E
86.Thedefinitivenotochordunderliesthe
a. Cloacalmembrane.
b. Coelom.
c. Neuralgroove.
d. Neuraltube.
e. Neurentericcanal.
Ans:D
