Test Bank for Modern Dental Assisting, 14th Edition by Debbie | All Chapters Included

Test Bank For Dental Assisting for
24 24 24 24 24


Modern Dental Assisting 14th Edition
24 24 24 24



Editors24:
Jeffrey24R.24Smith24&24Debbie24S.24Robinson

,Chapter241.24Oral24Embryology24and24Histology



1. Which24of24the24following24is24the24process24by24which24the24cells24of24the24fertilized24egg
24divide24and24form24a24ball24of24cells24during24embryonic24development?
A. Cleavage
B. Differentiation
C. Organogenesis
D. Implantation
Answer:24A.24Cleavage
Rationale:24Cleavage24is24the24series24of24rapid24mitotic24divisions24that24occur24after24fertil
ization,24leading24to24the24formation24of24a24ball24of24cells24known24as24the24morula.
DIF:24Easy
TOP:24Embryonic24developme
nt24MSC:24Multiple24Choice
2. During24the24first24week24of24embryonic24development,24the24fertilized24egg24becomes24a2
4structure24called24a:
A. Zygote
B. Blastocyst
C. Morula
D. Embryo
Answer:24B.24Blastocyst
Rationale:24After24fertilization24and24cleavage,24the24ball24of24cells24(morula)24forms24into24
a24blastocyst,24which24implants24into24the24uterine24wall.
DIF:24Easy
TOP:24Embryonic24developme
nt24MSC:24Multiple24Choice
3. The24oral24cavity24begins24to24develop24during24which24of24the24following24stages24of24
embryonic24development?
A. Zygote
B. Fetal
C. Pre-implantation
D. Embryonic
Answer:24D.24Embryonic
Rationale:24The24development24of24the24oral24cavity24starts24during24the24embryonic24stage,
24around24the24third24week24of24pregnancy,24as24the24facial24structures24begin24to24form.
DIF:24Moderate
TOP:24Oral24cavity24developme
nt24MSC:24Multiple24Choice
4. The24process24by24which24the24neural24tube24forms24and24begins24to24develop24into24the
24brain24and24spinal24cord24is24known24as:
A. Gastrulation
B. Neurulation
C. Cleavage
D. Organogenesis

, Answer:24B.24Neurulation
Rationale:24Neurulation24is24the24process24where24the24neural24tube24forms,24which24later24
gives24rise24to24the24central24nervous24system24(brain24and24spinal24cord).
DIF:24Moderate
TOP:24Neural24development24
MSC:24Multiple24Choice
5. Which24of24the24following24is24the24primary24function24of24the24mesoderm24layer24in24
embryonic24development?
A. Formation24of24the24nervous24system
B. Development24of24the24skin24and24hair
C. Formation24of24muscles,24bones,24and24circulatory24systems
D. Formation24of24the24digestive24system
Answer:24C.24Formation24of24muscles,24bones,24and24circulatory24systems
Rationale:24The24mesoderm24layer24gives24rise24to24structures24such24as24muscles,24bones,24and24
the24circulatory24system24during24embryonic24development.
DIF:24Moderate24T
OP:24Germ24layers
MSC:24Multiple24Choice
6. The24term24"histology"24refers24to24the24study24of:
A. The24structure24and24function24of24tissues
B. The24development24of24organs
C. The24structure24of24cells
D. The24development24of24embryos
Answer:24A.24The24structure24and24function24of24tissues
Rationale:24Histology24is24the24study24of24tissues,24including24their24structure24and24functio
n,24and24their24role24in24the24body.
DIF:24Easy2 4 T
OP:24Histology
MSC:24Multiple24Choice
7. The24enamel24of24the24tooth24is24derived24from24which24embryonic24tissue?
A. Ectoderm
B. Mesoderm
C. Endoderm
D. Neural24crest
Answer:24A.24Ectoderm
Rationale:24Enamel,24the24hard24outer24surface24of24the24tooth,24develops24from24the24ectod
ermal24layer24of24the24embryo.
DIF:24Moderate
TOP:24Tooth24development24M
SC:24Multiple24Choice
8. The24development24of24the24face24and24oral24cavity24during24embryonic24development24
involves24fusion24of24which24structures?
A. Palatal24shelves
B. Maxillary24and24mandibular24processes
C. Frontal24nasal24process
D. Both24B24and24C

, Answer:24D.24Both24B24and24C
Rationale:24The24development24of24the24face24and24oral24cavity24involves24the24fusion24of24t
he24maxillary24and24mandibular24processes,24as24well24as24the24frontal24nasal24process.
DIF:24Moderate
TOP:24Facial24development24M
SC:24Multiple24Choice
9. Which24structure24is24responsible24for24the24formation24of24the24teeth24during24e
mbryonic24development?
A. Neural24crest
B. Ectoderm
C. Mesoderm
D. Endoderm
Answer:24A.24Neural24crest
Rationale:24The24neural24crest24cells24play24a24crucial24role24in24the24formation24of24the24teeth24d
uring24embryonic24development.
DIF:24Moderate
TOP:24Tooth24formatio
n24MSC:24Multiple24C
hoice
10. The24first24indication24of24tooth24development24occurs24during24which24week24of24e
mbryonic24development?
A. 2nd24week
B. 5th24week
C. 6th24week
D. 7th24week
Answer:24C.246th24week
Rationale:24The24first24indication24of24tooth24development24appears24during24the246th24wee
k24of24embryonic24development,24when24the24dental24lamina24forms.
DIF:24Moderate
TOP:24Tooth24development24M
SC:24Multiple24Choice
11. The24process24of24ossification24refers24to:
A. The24formation24of24blood24cells
B. The24formation24of24bone
C. The24development24of24the24skin
D. The24development24of24the24digestive24system
Answer:24B.24The24formation24of24bone
Rationale:24Ossification24is24the24process24by24which24bone24tissue24is24formed24from24carti
lage24or24other24connective24tissue.
DIF:24Moderate
TOP:24Bone24development
24MSC:24Multiple24Choice
12. Which24of24the24following24is24a24key24feature24of24the24histological24structure24of24enamel?
A. It24is24composed24of24collagen24fibers
B. It24is24avascular24and24has24no24living24cells
C. It24contains24many24blood24vessels
D. It24has24a24high24content24of24water