Test Bank for Modern Dental Assisting 13th Edition by Bird

Test Bank For Dental Assisting for Mod
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ern Dental Assisting 14th Edition
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Editorst:
JeffreytR.tSmitht&tDebbietS.tRobinson

,Chaptert1.tOraltEmbryologytandtHistology



1. Whichtoftthetfollowingtistthetprocesstbytwhichtthetcellstoftthetfertilizedteggtdividetandtformt
atballtoftcellstduringtembryonictdevelopment?
A. Cleavage
B. Differentiation
C. Organogenesis
D. Implantation
Answer:tA.tCleavage
Rationale:tCleavagetistthetseriestoftrapidtmitotictdivisionstthattoccurtaftertfertilization,tlead
ingttotthetformationtoftatballtoftcellstknowntastthetmorula.
DIF:tEasy
TOP:tEmbryonictdevelopmentt
MSC:tMultipletChoice
2. Duringtthetfirsttweektoftembryonictdevelopment,tthetfertilizedteggtbecomestatstructuretcall
edta:
A. Zygote
B. Blastocyst
C. Morula
D. Embryo
Answer:tB.tBlastocyst
Rationale:tAftertfertilizationtandtcleavage,tthetballtoftcellst(morula)tformstintotatblas
tocyst,twhichtimplantstintotthetuterinetwall.
DIF:tEasy
TOP:tEmbryonictdevelopmentt
MSC:tMultipletChoice
3. Thetoraltcavitytbeginsttotdeveloptduringtwhichtoftthetfollowingtstagestoftembryonictdev
elopment?
A. Zygote
B. Fetal
C. Pre-implantation
D. Embryonic
Answer:tD.tEmbryonic
Rationale:tThetdevelopmenttoftthetoraltcavitytstartstduringtthetembryonictstage,taroundtthett
hirdtweektoftpregnancy,tastthetfacialtstructurestbeginttotform.
DIF:tModerate
TOP:tOraltcavitytdevelopmentt
MSC:tMultipletChoice
4. Thetprocesstbytwhichtthetneuralttubetformstandtbeginsttotdeveloptintotthetbraintandtspin
altcordtistknowntas:
A. Gastrulation
B. Neurulation
C. Cleavage
D. Organogenesis

, Answer:tB.tNeurulation
Rationale:tNeurulationtistthetprocesstwheretthetneuralttubetforms,twhichtlatertgivestrisettotth
etcentraltnervoustsystemt(braintandtspinaltcord).
DIF:tModerate
TOP:tNeuraltdevelopmentt
MSC:tMultipletChoice
5. Whichtoftthetfollowingtistthetprimarytfunctiontoftthetmesodermtlayertintembryonictdev
elopment?
A. Formationtoftthetnervoustsystem
B. Developmenttoftthetskintandthair
C. Formationtoftmuscles,tbones,tandtcirculatorytsystems
D. Formationtoftthetdigestivetsystem
Answer:tC.tFormationtoftmuscles,tbones,tandtcirculatorytsystems
Rationale:tThetmesodermtlayertgivestrisettotstructurestsuchtastmuscles,tbones,tandtthetcirc
ulatorytsystemtduringtembryonictdevelopment.
DIF:tModeratetTO
P:tGermtlayers
MSC:tMultipletChoice
6. Thettermt"histology"trefersttotthetstudytof:
A. Thetstructuretandtfunctiontofttissues
B. Thetdevelopmenttoftorgans
C. Thetstructuretoftcells
D. Thetdevelopmenttoftembryos
Answer:tA.tThetstructuretandtfunctiontofttissues
Rationale:tHistologytistthetstudytofttissues,tincludingttheirtstructuretandtfunction,tandtthei
rtroletintthetbody.
DIF:t EasytTOP
:tHistology
MSC:tMultipletChoice
7. Thetenameltoftthettoothtistderivedtfromtwhichtembryonicttissue?
A. Ectoderm
B. Mesoderm
C. Endoderm
D. Neuraltcrest
Answer:tA.tEctoderm
Rationale:tEnamel,tthethardtoutertsurfacetoftthettooth,tdevelopstfromtthetectodermaltlaye
rtoftthetembryo.
DIF:tModerate
TOP:tToothtdevelopmentt
MSC:tMultipletChoice
8. Thetdevelopmenttoftthetfacetandtoraltcavitytduringtembryonictdevelopmenttinvolvestfus
iontoftwhichtstructures?
A. Palataltshelves
B. Maxillarytandtmandibulartprocesses
C. Frontaltnasaltprocess
D. BothtBtandtC

, Answer:tD.tBothtBtandtC
Rationale:tThetdevelopmenttoftthetfacetandtoraltcavitytinvolvestthetfusiontoftthetmax
illarytandtmandibulartprocesses,tastwelltastthetfrontaltnasaltprocess.
DIF:tModerate
TOP:tFacialtdevelopmentt
MSC:tMultipletChoice
9. Whichtstructuretistresponsibletfortthetformationtoftthetteethtduringtembryonictdev
elopment?
A. Neuraltcrest
B. Ectoderm
C. Mesoderm
D. Endoderm
Answer:tA.tNeuraltcrest
Rationale:tThetneuraltcresttcellstplaytatcrucialtroletintthetformationtoftthetteethtduringtembr
yonictdevelopment.
DIF:tModerate
TOP:tToothtformationt
MSC:tMultipletChoice
10. Thetfirsttindicationtofttoothtdevelopmenttoccurstduringtwhichtweektoftembryonictdev
elopment?
A. 2ndtweek
B. 5thtweek
C. 6thtweek
D. 7thtweek
Answer:tC.t6thtweek
Rationale:tThetfirsttindicationtofttoothtdevelopmenttappearstduringtthet6thtweektoftem
bryonictdevelopment,twhentthetdentaltlaminatforms.
DIF:tModerate
TOP:tToothtdevelopmentt
MSC:tMultipletChoice
11. Thetprocesstoftossificationtreferstto:
A. Thetformationtoftbloodtcells
B. Thetformationtoftbone
C. Thetdevelopmenttoftthetskin
D. Thetdevelopmenttoftthetdigestivetsystem
Answer:tB.tThetformationtoftbone
Rationale:tOssificationtistthetprocesstbytwhichtbonettissuetistformedtfromtcartilagetortothe
rtconnectivettissue.
DIF:tModerate
TOP:tBonetdevelopmentt
MSC:tMultipletChoice
12. Whichtoftthetfollowingtistatkeytfeaturetoftthethistologicaltstructuretoftenamel?
A. Ittistcomposedtoftcollagentfibers
B. Ittistavasculartandthastnotlivingtcells
C. Ittcontainstmanytbloodtvessels
D. Itthastathightcontenttoftwater