Test Bank For Dental Assisting for
h h h h h
Modern Dental Assisting 14th Edition
h h h h
Editors h:
Jeffrey hR. hSmith h& hDebbie hS. hRobinson
,Chapter h1. hOral hEmbryology hand hHistology
1. Which hof hthe hfollowing his hthe hprocess hby hwhich hthe hcells hof hthe hfertilized hegg hdivide
hand hform ha hball hof hcells hduring hembryonic hdevelopment?
A. Cleavage
B. Differentiation
C. Organogenesis
D. Implantation
Answer: hA. hCleavage
Rationale: hCleavage his hthe hseries hof hrapid hmitotic hdivisions hthat hoccur hafter
hfertilization, hleading hto hthe hformation hof ha hball hof hcells hknown has hthe hmorula.
DIF: hEasy
TOP: hEmbryonic hdevelopment
hMSC: hMultiple hChoice
2. During hthe hfirst hweek hof hembryonic hdevelopment, hthe hfertilized hegg hbecomes ha
hstructure hcalled ha:
A. Zygote
B. Blastocyst
C. Morula
D. Embryo
Answer: hB. hBlastocyst
Rationale: hAfter hfertilization hand hcleavage, hthe hball hof hcells h(morula) hforms hinto ha
hblastocyst, hwhich himplants hinto hthe huterine hwall.
DIF: hEasy
TOP: hEmbryonic hdevelopment
hMSC: hMultiple hChoice
3. The horal hcavity hbegins hto hdevelop hduring hwhich hof hthe hfollowing hstages hof
hembryonic hdevelopment?
A. Zygote
B. Fetal
C. Pre-implantation
D. Embryonic
Answer: hD. hEmbryonic
Rationale: hThe hdevelopment hof hthe horal hcavity hstarts hduring hthe hembryonic hstage,
haround hthe hthird hweek hof hpregnancy, has hthe hfacial hstructures hbegin hto hform.
DIF: hModerate
TOP: hOral hcavity hdevelopment
hMSC: hMultiple hChoice
4. The hprocess hby hwhich hthe hneural htube hforms hand hbegins hto hdevelop hinto hthe hbrain
hand hspinal hcord his hknown has:
A. Gastrulation
B. Neurulation
C. Cleavage
D. Organogenesis
, Answer: hB. hNeurulation
Rationale: hNeurulation his hthe hprocess hwhere hthe hneural htube hforms, hwhich hlater hgives
hrise hto hthe hcentral hnervous hsystem h(brain hand hspinal hcord).
DIF: hModerate
TOP: hNeural hdevelopment
hMSC: hMultiple hChoice
5. Which hof hthe hfollowing his hthe hprimary hfunction hof hthe hmesoderm hlayer hin
hembryonic hdevelopment?
A. Formation hof hthe hnervous hsystem
B. Development hof hthe hskin hand hhair
C. Formation hof hmuscles, hbones, hand hcirculatory hsystems
D. Formation hof hthe hdigestive hsystem
Answer: hC. hFormation hof hmuscles, hbones, hand hcirculatory hsystems
Rationale: hThe hmesoderm hlayer hgives hrise hto hstructures hsuch has hmuscles, hbones, hand hthe
hcirculatory hsystem hduring hembryonic hdevelopment.
DIF: hModerate
hTOP: hGerm hlayers
MSC: hMultiple hChoice
6. The hterm h"histology" hrefers hto hthe hstudy hof:
A. The hstructure hand hfunction hof htissues
B. The hdevelopment hof horgans
C. The hstructure hof hcells
D. The hdevelopment hof hembryos
Answer: hA. hThe hstructure hand hfunction hof htissues
Rationale: hHistology his hthe hstudy hof htissues, hincluding htheir hstructure hand hfunction,
hand htheir hrole hin hthe hbody.
DIF: hEasy
h TOP:
hHistology
MSC: hMultiple hChoice
7. The henamel hof hthe htooth his hderived hfrom hwhich hembryonic htissue?
A. Ectoderm
B. Mesoderm
C. Endoderm
D. Neural hcrest
Answer: hA. hEctoderm
Rationale: hEnamel, hthe hhard houter hsurface hof hthe htooth, hdevelops hfrom hthe hectodermal
hlayer hof hthe hembryo.
DIF: hModerate
TOP: hTooth hdevelopment
hMSC: hMultiple hChoice
8. The hdevelopment hof hthe hface hand horal hcavity hduring hembryonic hdevelopment
hinvolves hfusion hof hwhich hstructures?
A. Palatal hshelves
B. Maxillary hand hmandibular hprocesses
C. Frontal hnasal hprocess
D. Both hB hand hC
, Answer: hD. hBoth hB hand hC
Rationale: hThe hdevelopment hof hthe hface hand horal hcavity hinvolves hthe hfusion hof hthe
hmaxillary hand hmandibular hprocesses, has hwell has hthe hfrontal hnasal hprocess.
DIF: hModerate
TOP: hFacial hdevelopment
hMSC: hMultiple hChoice
9. Which hstructure his hresponsible hfor hthe hformation hof hthe hteeth hduring
hembryonic hdevelopment?
A. Neural hcrest
B. Ectoderm
C. Mesoderm
D. Endoderm
Answer: hA. hNeural hcrest
Rationale: hThe hneural hcrest hcells hplay ha hcrucial hrole hin hthe hformation hof hthe hteeth hduring
hembryonic hdevelopment.
DIF: hModerate
TOP: hTooth
hformation hMSC:
hMultiple hChoice
10. The hfirst hindication hof htooth hdevelopment hoccurs hduring hwhich hweek hof
hembryonic hdevelopment?
A. 2nd hweek
B. 5th hweek
C. 6th hweek
D. 7th hweek
Answer: hC. h6th hweek
Rationale: hThe hfirst hindication hof htooth hdevelopment happears hduring hthe h6th hweek hof
hembryonic hdevelopment, hwhen hthe hdental hlamina hforms.
DIF: hModerate
TOP: hTooth hdevelopment
hMSC: hMultiple hChoice
11. The hprocess hof hossification hrefers hto:
A. The hformation hof hblood hcells
B. The hformation hof hbone
C. The hdevelopment hof hthe hskin
D. The hdevelopment hof hthe hdigestive hsystem
Answer: hB. hThe hformation hof hbone
Rationale: hOssification his hthe hprocess hby hwhich hbone htissue his hformed hfrom hcartilage
hor hother hconnective htissue.
DIF: hModerate
TOP: hBone hdevelopment
hMSC: hMultiple hChoice
12. Which hof hthe hfollowing his ha hkey hfeature hof hthe hhistological hstructure hof henamel?
A. It his hcomposed hof hcollagen hfibers
B. It his havascular hand hhas hno hliving hcells
C. It hcontains hmany hblood hvessels
D. It hhas ha hhigh hcontent hof hwater
h h h h h
Modern Dental Assisting 14th Edition
h h h h
Editors h:
Jeffrey hR. hSmith h& hDebbie hS. hRobinson
,Chapter h1. hOral hEmbryology hand hHistology
1. Which hof hthe hfollowing his hthe hprocess hby hwhich hthe hcells hof hthe hfertilized hegg hdivide
hand hform ha hball hof hcells hduring hembryonic hdevelopment?
A. Cleavage
B. Differentiation
C. Organogenesis
D. Implantation
Answer: hA. hCleavage
Rationale: hCleavage his hthe hseries hof hrapid hmitotic hdivisions hthat hoccur hafter
hfertilization, hleading hto hthe hformation hof ha hball hof hcells hknown has hthe hmorula.
DIF: hEasy
TOP: hEmbryonic hdevelopment
hMSC: hMultiple hChoice
2. During hthe hfirst hweek hof hembryonic hdevelopment, hthe hfertilized hegg hbecomes ha
hstructure hcalled ha:
A. Zygote
B. Blastocyst
C. Morula
D. Embryo
Answer: hB. hBlastocyst
Rationale: hAfter hfertilization hand hcleavage, hthe hball hof hcells h(morula) hforms hinto ha
hblastocyst, hwhich himplants hinto hthe huterine hwall.
DIF: hEasy
TOP: hEmbryonic hdevelopment
hMSC: hMultiple hChoice
3. The horal hcavity hbegins hto hdevelop hduring hwhich hof hthe hfollowing hstages hof
hembryonic hdevelopment?
A. Zygote
B. Fetal
C. Pre-implantation
D. Embryonic
Answer: hD. hEmbryonic
Rationale: hThe hdevelopment hof hthe horal hcavity hstarts hduring hthe hembryonic hstage,
haround hthe hthird hweek hof hpregnancy, has hthe hfacial hstructures hbegin hto hform.
DIF: hModerate
TOP: hOral hcavity hdevelopment
hMSC: hMultiple hChoice
4. The hprocess hby hwhich hthe hneural htube hforms hand hbegins hto hdevelop hinto hthe hbrain
hand hspinal hcord his hknown has:
A. Gastrulation
B. Neurulation
C. Cleavage
D. Organogenesis
, Answer: hB. hNeurulation
Rationale: hNeurulation his hthe hprocess hwhere hthe hneural htube hforms, hwhich hlater hgives
hrise hto hthe hcentral hnervous hsystem h(brain hand hspinal hcord).
DIF: hModerate
TOP: hNeural hdevelopment
hMSC: hMultiple hChoice
5. Which hof hthe hfollowing his hthe hprimary hfunction hof hthe hmesoderm hlayer hin
hembryonic hdevelopment?
A. Formation hof hthe hnervous hsystem
B. Development hof hthe hskin hand hhair
C. Formation hof hmuscles, hbones, hand hcirculatory hsystems
D. Formation hof hthe hdigestive hsystem
Answer: hC. hFormation hof hmuscles, hbones, hand hcirculatory hsystems
Rationale: hThe hmesoderm hlayer hgives hrise hto hstructures hsuch has hmuscles, hbones, hand hthe
hcirculatory hsystem hduring hembryonic hdevelopment.
DIF: hModerate
hTOP: hGerm hlayers
MSC: hMultiple hChoice
6. The hterm h"histology" hrefers hto hthe hstudy hof:
A. The hstructure hand hfunction hof htissues
B. The hdevelopment hof horgans
C. The hstructure hof hcells
D. The hdevelopment hof hembryos
Answer: hA. hThe hstructure hand hfunction hof htissues
Rationale: hHistology his hthe hstudy hof htissues, hincluding htheir hstructure hand hfunction,
hand htheir hrole hin hthe hbody.
DIF: hEasy
h TOP:
hHistology
MSC: hMultiple hChoice
7. The henamel hof hthe htooth his hderived hfrom hwhich hembryonic htissue?
A. Ectoderm
B. Mesoderm
C. Endoderm
D. Neural hcrest
Answer: hA. hEctoderm
Rationale: hEnamel, hthe hhard houter hsurface hof hthe htooth, hdevelops hfrom hthe hectodermal
hlayer hof hthe hembryo.
DIF: hModerate
TOP: hTooth hdevelopment
hMSC: hMultiple hChoice
8. The hdevelopment hof hthe hface hand horal hcavity hduring hembryonic hdevelopment
hinvolves hfusion hof hwhich hstructures?
A. Palatal hshelves
B. Maxillary hand hmandibular hprocesses
C. Frontal hnasal hprocess
D. Both hB hand hC
, Answer: hD. hBoth hB hand hC
Rationale: hThe hdevelopment hof hthe hface hand horal hcavity hinvolves hthe hfusion hof hthe
hmaxillary hand hmandibular hprocesses, has hwell has hthe hfrontal hnasal hprocess.
DIF: hModerate
TOP: hFacial hdevelopment
hMSC: hMultiple hChoice
9. Which hstructure his hresponsible hfor hthe hformation hof hthe hteeth hduring
hembryonic hdevelopment?
A. Neural hcrest
B. Ectoderm
C. Mesoderm
D. Endoderm
Answer: hA. hNeural hcrest
Rationale: hThe hneural hcrest hcells hplay ha hcrucial hrole hin hthe hformation hof hthe hteeth hduring
hembryonic hdevelopment.
DIF: hModerate
TOP: hTooth
hformation hMSC:
hMultiple hChoice
10. The hfirst hindication hof htooth hdevelopment hoccurs hduring hwhich hweek hof
hembryonic hdevelopment?
A. 2nd hweek
B. 5th hweek
C. 6th hweek
D. 7th hweek
Answer: hC. h6th hweek
Rationale: hThe hfirst hindication hof htooth hdevelopment happears hduring hthe h6th hweek hof
hembryonic hdevelopment, hwhen hthe hdental hlamina hforms.
DIF: hModerate
TOP: hTooth hdevelopment
hMSC: hMultiple hChoice
11. The hprocess hof hossification hrefers hto:
A. The hformation hof hblood hcells
B. The hformation hof hbone
C. The hdevelopment hof hthe hskin
D. The hdevelopment hof hthe hdigestive hsystem
Answer: hB. hThe hformation hof hbone
Rationale: hOssification his hthe hprocess hby hwhich hbone htissue his hformed hfrom hcartilage
hor hother hconnective htissue.
DIF: hModerate
TOP: hBone hdevelopment
hMSC: hMultiple hChoice
12. Which hof hthe hfollowing his ha hkey hfeature hof hthe hhistological hstructure hof henamel?
A. It his hcomposed hof hcollagen hfibers
B. It his havascular hand hhas hno hliving hcells
C. It hcontains hmany hblood hvessels
D. It hhas ha hhigh hcontent hof hwater
