embryology exam_i.pdf

8/14/2019 embryology Exam_I.PDF

1/8

EfidIBRYOLOGYFALL, 2AO4EXAM

1. The humankaryotYPes madeuP of chromosomes-A.22

@r'C . M@ouThis ullcornplementf chromosomess temned:

@o'oloid,or2NB. Diploid, r 1NC. Haptoid, r 1ND. Haploid, r 2N

At ovulation,an oocyte:A. Hascompletedmeiosis I and is in interphase

@rf completed neiosis l'@fas completedmeiosis and is in metaphaseof meiosis lD-Has completedmeiosis I and is in prophaseof meiosis l

4. Onespermatogonlurnillgiverise oA. 18 . 2c . 3@+

(number)of maturesperm. r

5. Oneoogoniumwill give rise of A ) 1\ \ JV 8 . 2

c . 3D . 4

(number) f mature vum/ova.

2.

3.


2/8

2 r L\\t.g

7.

6. Where o hegermcellsn an aduft uman riginallyornerom?A. Theprimordialermcellsare irstcreatednthegonads tpubefi

@A lifetimeupply f primordialermcells ssetasideearly nv/ embryogenesisn thewallcf theyolksacln females, lifetime upply f primordialermcells s setaside n the

wallof heyolksacduring mbryogenesis,hile nmales; rimordialgermcells irstarise n hegonads t pubertyD. Primordial ermcells irst arisewithin he intermediatemesodermofthe tritarninar mbryo

In gametogenesis,he germcellundergoesmeiosis.The startingnumberofchnomosomesat the beginning f meiosls is:A- 1N

r[B)2N-VC.3ND-4N

At the cornpletion f melosis (and ust as the cell is ready o beginmeiosisll), the chromosomal number s:fA) tt l\JB.2N

C. 3ND. 4N

9. At the stagediscussedn question 8), he DNA number s:A 1 N

4-IBt2N\v c . 3 ND. 4N

l0.Ovulationoccurs n direct esponseo a rise n:A. The evels f the horrnonesstrogen ndprogesteroneB.The evelsof thehormone CG

@ fh* hvelsof the hormonesHandFSH v'

L

D. The levefsof the hormoneGnRH


3/8

3ru\ \L}11 The ovarianhormones hat act on the endometrium o stimulate ts growthanddecidualizationre:

dB Estrogenand progesterone\.7 B. hCG

C. LHand FSHD. GnRH

t2-tAffrat tructures formed by differentiation f the granulosacellsrernaining nthe ovarian ollicleafter ovulation?^ -flltFumulusoophorus\./B- Corona radiataC. Trophoblasttril

@Corpus luteum13.Where n the Fallopian ube does ertilizationmostcornmonlyake place?

A. Fimbria,lhf SAmpulla\JC. sthmusD. nfundibulum'l4.Aftercapacitationhe spermmust stillundergo before it isableto fertilize he ovum.A. The cortical eactionts.Membranedepolarization*f ClThe acrosomeeactiont\. -atD. Formation f the malepronucleus

ls.Ghromosomes rom both he male andthe femalegarnetes re able o lineuptogetherat the metaphaseplateof the fertilizedovum thanks to:A. Movementsof the sperm ailB. The fusionof the maleand emalenuclearmembranes

f7/r\{C}fhe disintegration f the maleand femalenuclearmembranesD.The cortical eaction


4/8

16.Successive itotic ivisions f thezygote ielda rnulticellularumpystructurealleda:AMorulaVB.Blastula

C.TroPhoblastD.Blastomere17.After ompaction,fluid illedcavity orms nthestructurc amedabovewhich s calledalan:

A. [email protected]

D.Outercellmass18.Whichof the ollowing re otipotentells?

A. EmbryoblastellsB.Trophoblasteilsfi

ih,t Cl BlastomeresYD.EPiblastlg.When heembryomplantsn heendometrium,heouter ellmassdiffierentiatesntoa two-layered tructure alledhe:

A. BilaminarmbryoB.Trilaminarmbryo@rrophoblastD. Decidua asalis

20.The innerwall of the amnioticcavity s linedwith cellsof the:SEpiblastB.Hypoblast

C.HeusefsmembraneD. ntraembryonicesoderm


5/8

21,The nnerwaflof the primitive olksac is linedwith:A. EPiblast

@|vooblast.8,rf,l Heuser'smembraneU T-D- ntraembryonicmesoderm

zz.The partof the endometrium eep to the devefoping mbryo s called he:A. Chorion rondosum villous)B. Decidua PsularisC. DeciduaParietalis

flD]Deciduabasalis\ . 5Zg.Atabout hreernonths,he amnioticcavityhasgrown o fill the uterinecavity,and:

A. The amnioticcavrty s replacedby the chorioniccavityand the deciduaParietalis egeneratesB.The deciduaparietalis ndthe chorionic late use o form heamniochorionic embraneh-I C]IIhe chorionic avity s dlsplaced,he deciduacapsularis egenerates,

V andthe amniochorionic embranes formed.D.Thedeciduacapsularis nd the chorionic late orm he placenta

Z4.A bilaminar mbryodifferentiatesntoa trilaminar mbryoby meansof:A. Ventralmigrationof ectodermalcells hrough he primitivestreakB. Ventralmigration f mesodermal ells hrough he primitive treakA- / _ \ rntralmigration f epiblastcells hrough he primitive treak/r : t\t,$ l v r E r \\\ ttD. Dorsal nigration f epiblastcells hrough he primitive treak

2E.The irststructureo fonn longitudinaltylong he midlineaxisof the trilaminarembryo s the:ff ffiNotochord\=/B. Neural ube

C.NeuralPlateD. Gonnecting talk


6/8

26.Formationf theneuralube s nduced ysignalsrom he:A. Neural late

&i-\I B]lNotochord\=,/C.PrimitivetreakD. LateralPlate nesoderm

27.Closure f theroof dorsal) f theneuralubebeginsat the:ffimioolr\ IE7B. CaudalendC. CranialendD.Both caudalandcranialends

28.Thefirstdilatations n the rostralend of the neural ubeform, from rostral tocaudal, he:A Prosencephalon,hornbencephalon,nd mesencephalonB. Rhombencephalon,rosencephafon,nd mesencephalonC. Rhombencephalon, esencephalon,nd prosencephalon

- tfrtsrosencephalon, mesencephalon,nd rhombencephalon29 One of ttreanomalies esulting rom lack of closureof the caudalneuroporeis :

A. AnencephalyB. Oligohydramnios

SpinabifidaD. Glub oot

30.Oneof the anomalies esultingrom insufJicientmigrationof neuralcrest cellsto Pharyngeal rch is: rn6-* t Pu\' 'A. Thymus/parathYroidPlasia

( B.)IJnderdevelopmentf the lower ace and awR ' E -C.BranchiatystsD.Thyroglossalyst


7/8

31.In he development f thepharyngeal rches:A. Arch I growsdownoverArches l, lll, and lV to meetArchVl andobliterateClefts , ll, lll, and lV

Arch tl growsdownoverArchesttl and tV to meetArchVl andobliterateCbfts ll, lll, and lVC. pouch ll growsdownover Pouches ll and lV to meetPouchVl andobliterateClefts l, lll, and lVD. pouch l growsdownoverPouches ll and lVto meetPouchVl andobliteratePouches l, lll, and lV

32.The overgrowth escribedabove emporarily reatesa hollowwhich is knownas the:A. Lacuna

A \ .flB$Cervicalinusl r tvC.CapillaryinusoidD.BlastocYst

33.Transverseoldingof the rilaminar mbryo ringshe endodermentrally ndmedially here tfusesalongmostof themidlineo fonn he iningof the:A. Heart ube

ffi)cut tube\-/C. TracheaD. Neural ube

34.Longitudinaloldingof the trilarninarembryomoves he endocardialubes o aposition@-ntral andcaudal oLSB. Medial ndventral 'VI^a\SCranial andventralD. Dorsaland caudal{

SS. he endocardialubes are continuouswiththe dorsalaortaerAil | rue\- JtB. False


8/8

36 The lateralplatemesodermsplits ntoa dorsal andaventralA. Amnioticsac andyolksac, respectivelyB. Splanchnopleurend $omatopleure,espectively

p So*atopleureand sp anchnopeure, espectivelyD. Periardium nd peritoneurn,espectively37.The face develops romfive primordia:

A. Derived rom intermediatemesoderm,his mesenchyme urroundsthe stomodeurn, nd consistsof two frontonasalprorninences,womaxillary rominences, nd a mandibular rominenceostlyof neural restorigin,hismesenchymeurToundshestomodeum,ndconsists f twomaxillary rominences,womandibularrominences,nda frontonasalrominence

f,SMesenchymerompharyngealrches, ll, and V,surroundingheI t stomodeumndconsistsingftwomaxillary rominences,womandibularrominences,ndq frontonasalrominence

Mesenchymerompharyngeal rches , ll, and lll, surroundinghestomodeum, nd consisting f two maxillary rominences,mandibular rominence, nd So frontonasal rominences

38.Failrrleof apoptosis an ead o:f AJRemnantsof thyroglossal uctB. Branchial ysts

C. Cleft ipD. Disintegration f the stomodeum

39.Monozygoticwins hat splitduring the blastocyst tage i.e.,a splitwithin heinntercell mass)will have:A. Two arnnionic acs, wo chorionic acs,andhnto lacentas

f'B)two amnionic acs,onechorionic ac, and one placenta\-/ C. Twoamnionic fics, onechorionic ac,and two plaCentasS. One amnionicSac,one chorionic ac,and oneplacenta

embryology exam_i.pdf

Documents