Test Bank For DentalAssisting for
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Modern Dental Assisting 14th Edition
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Editors :
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Jeffrey R. Smith & Debbie S. Robinson
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,Chapter 1. Oral Embryology and Histology
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1. Which of the following is the process by which the cells of the fertilized egg divide and
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form a ball of cells during embryonic development?
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A. Cleavage
B. Differentiation
C. Organogenesis
D. Implantation
Answer: A. Cleavage GH GH
Rationale: Cleavage is the series of rapid mitotic divisions that occur after fertilization, le
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ading to the formation of a ball of cells known as the morula.
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DIF: Easy GH
TOP: Embryonic development
GH GH GH
MSC: Multiple Choice GH GH
2. During the first week of embryonic development, the fertilized egg becomes a structure
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called a: GH
A. Zygote
B. Blastocyst
C. Morula
D. Embryo
Answer: B. Blastocyst GH GH
Rationale: After fertilization and cleavage, the ball of cells (morula) forms into a blastocy
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st, which implants into the uterine wall.
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DIF: Easy GH
TOP: Embryonic development
GH GH GH
MSC: Multiple Choice GH GH
3. The oral cavity begins to develop during which of the following stages of embryonic
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development?
A. Zygote
B. Fetal
C. Pre-implantation
D. Embryonic
Answer: D. Embryonic GH GH
Rationale: The development of the oral cavity starts during the embryonic stage, around t
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he third week of pregnancy, as the facial structures begin to form.
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DIF: Moderate GH
TOP: Oral cavity development
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MSC: Multiple Choice GH GH
4. The process by which the neural tube forms and begins to develop into the brain and
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spinal cord is known as: GH GH GH GH
A. Gastrulation
B. Neurulation
C. Cleavage
D. Organogenesis
, Answer: B. Neurulation GH GH
Rationale: Neurulation is the process where the neural tube forms, which later gives rise t
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o the central nervous system (brain and spinal cord).
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DIF: Moderate GH
TOP: Neural development MSGH GH GH
C: Multiple Choice
GH GH
5. Which of the following is the primary function of the mesoderm layer in embryonic
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development?
A. Formation of the nervous system GH GH GH GH
B. Development of the skin and hair GH GH GH GH GH
C. Formation of muscles, bones, and circulatory systems GH GH GH GH GH GH
D. Formation of the digestive system GH GH GH GH
Answer: C. Formation of muscles, bones, and circulatory systems
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Rationale: The mesoderm layer gives rise to structures such as muscles, bones, and the circulat
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ory system during embryonic development.
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DIF: Moderate TO GH GH
P: Germ layers
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MSC: Multiple Choice GH GH
6. The term "histology" refers to the study of:
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A. The structure and function of tissues
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B. The development of organs GH GH GH
C. The structure of cells GH GH GH
D. The development of embryos GH GH GH
Answer: A. The structure and function of tissuesGH GH GH GH GH GH GH
Rationale: Histology is the study of tissues, including their structure and function, and the
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ir role in the body.
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DIF: Easy TO GH G H
P: Histology
GH
MSC: Multiple Choice GH GH
7. The enamel of the tooth is derived from which embryonic tissue?
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A. Ectoderm
B. Mesoderm
C. Endoderm
D. Neural crest GH
Answer: A. Ectoderm GH GH
Rationale: Enamel, the hard outer surface of the tooth, develops from the ectodermal laye
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r of the embryo.
GH GH GH
DIF: Moderate GH
TOP: Tooth development MSCGH GH GH
: Multiple Choice
GH GH
8. The development of the face and oral cavity during embryonic development involves
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fusion of which structures? GH GH GH
A. Palatal shelves GH
B. Maxillary and mandibular processes GH GH GH
C. Frontal nasal process GH GH
D. Both B and C GH GH GH
, Answer: D. Both B and C GH GH GH GH GH
Rationale: The development of the face and oral cavity involves the fusion of the maxillar
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y and mandibular processes, as well as the frontal nasal process.
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DIF: Moderate GH
TOP: Facial development MSC
GH GH GH
: Multiple Choice
GH GH
9. Which structure is responsible for the formation of the teeth during embryonic
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development?
A. Neural crest GH
B. Ectoderm
C. Mesoderm
D. Endoderm
Answer: A. Neural crest GH GH GH
Rationale: The neural crest cells play a crucial role in the formation of the teeth during embryo
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nic development.
GH
DIF: Moderate GH
TOP: Tooth formation GH GH G
HMSC: Multiple Choic GH GH
e
10. The first indication of tooth development occurs during which week of embryonic
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development?
A. 2nd week GH
B. 5th week GH
C. 6th week GH
D. 7th week GH
Answer: C. 6th week GH GH GH
Rationale: The first indication of tooth development appears during the 6th week of embr
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yonic development, when the dental lamina forms.
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DIF: Moderate GH
TOP: Tooth development MSC
GH GH GH
: Multiple Choice
GH GH
11. The process of ossification refers to:
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A. The formation of blood cells GH GH GH GH
B. The formation of bone GH GH GH
C. The development of the skin GH GH GH GH
D. The development of the digestive system
GH GH GH GH GH
Answer: B. The formation of bone GH GH GH GH GH
Rationale: Ossification is the process by which bone tissue is formed from cartilage or ot
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her connective tissue.
GH GH
DIF: Moderate GH
TOP: Bone development GH GH GH
MSC: Multiple Choice GH GH
12. Which of the following is a key feature of the histological structure of enamel?
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A. It is composed of collagen fibers
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B. It is avascular and has no living cells
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C. It contains many blood vessels
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D. It has a high content of water
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GH GH GH G
H GH
Modern Dental Assisting 14th Edition
GH GH GH GH
Editors :
GH
Jeffrey R. Smith & Debbie S. Robinson
GH GH GH GH GH GH
,Chapter 1. Oral Embryology and Histology
GH GH GH GH GH
1. Which of the following is the process by which the cells of the fertilized egg divide and
GH GH GH GH GH GH GH GH GH GH GH GH GH GH GH GH GH
form a ball of cells during embryonic development?
GH GH GH GH GH GH GH
A. Cleavage
B. Differentiation
C. Organogenesis
D. Implantation
Answer: A. Cleavage GH GH
Rationale: Cleavage is the series of rapid mitotic divisions that occur after fertilization, le
GH GH GH GH GH GH GH GH GH GH GH GH GH
ading to the formation of a ball of cells known as the morula.
GH GH GH GH GH GH GH GH GH GH GH GH
DIF: Easy GH
TOP: Embryonic development
GH GH GH
MSC: Multiple Choice GH GH
2. During the first week of embryonic development, the fertilized egg becomes a structure
GH GH GH GH GH GH GH GH GH GH GH GH GH
called a: GH
A. Zygote
B. Blastocyst
C. Morula
D. Embryo
Answer: B. Blastocyst GH GH
Rationale: After fertilization and cleavage, the ball of cells (morula) forms into a blastocy
GH GH GH GH GH GH GH GH GH GH GH GH GH
st, which implants into the uterine wall.
GH GH GH GH GH GH
DIF: Easy GH
TOP: Embryonic development
GH GH GH
MSC: Multiple Choice GH GH
3. The oral cavity begins to develop during which of the following stages of embryonic
GH GH GH GH GH GH GH GH GH GH GH GH GH GH
development?
A. Zygote
B. Fetal
C. Pre-implantation
D. Embryonic
Answer: D. Embryonic GH GH
Rationale: The development of the oral cavity starts during the embryonic stage, around t
GH GH GH GH GH GH GH GH GH GH GH GH GH
he third week of pregnancy, as the facial structures begin to form.
GH GH GH GH GH GH GH GH GH GH GH
DIF: Moderate GH
TOP: Oral cavity development
GH GH GH GH
MSC: Multiple Choice GH GH
4. The process by which the neural tube forms and begins to develop into the brain and
GH GH GH GH GH GH GH GH GH GH GH GH GH GH GH GH
spinal cord is known as: GH GH GH GH
A. Gastrulation
B. Neurulation
C. Cleavage
D. Organogenesis
, Answer: B. Neurulation GH GH
Rationale: Neurulation is the process where the neural tube forms, which later gives rise t
GH GH GH GH GH GH GH GH GH GH GH GH GH GH
o the central nervous system (brain and spinal cord).
GH GH GH GH GH GH GH GH
DIF: Moderate GH
TOP: Neural development MSGH GH GH
C: Multiple Choice
GH GH
5. Which of the following is the primary function of the mesoderm layer in embryonic
GH GH GH GH GH GH GH GH GH GH GH GH GH GH
development?
A. Formation of the nervous system GH GH GH GH
B. Development of the skin and hair GH GH GH GH GH
C. Formation of muscles, bones, and circulatory systems GH GH GH GH GH GH
D. Formation of the digestive system GH GH GH GH
Answer: C. Formation of muscles, bones, and circulatory systems
GH GH GH GH GH GH GH GH
Rationale: The mesoderm layer gives rise to structures such as muscles, bones, and the circulat
GH GH GH GH GH GH GH GH GH GH GH GH GH GH
ory system during embryonic development.
GH GH GH GH
DIF: Moderate TO GH GH
P: Germ layers
GH GH
MSC: Multiple Choice GH GH
6. The term "histology" refers to the study of:
GH GH GH GH GH GH GH
A. The structure and function of tissues
GH GH GH GH GH
B. The development of organs GH GH GH
C. The structure of cells GH GH GH
D. The development of embryos GH GH GH
Answer: A. The structure and function of tissuesGH GH GH GH GH GH GH
Rationale: Histology is the study of tissues, including their structure and function, and the
GH GH GH GH GH GH GH GH GH GH GH GH GH
ir role in the body.
GH GH GH GH
DIF: Easy TO GH G H
P: Histology
GH
MSC: Multiple Choice GH GH
7. The enamel of the tooth is derived from which embryonic tissue?
GH GH GH GH GH GH GH GH GH GH
A. Ectoderm
B. Mesoderm
C. Endoderm
D. Neural crest GH
Answer: A. Ectoderm GH GH
Rationale: Enamel, the hard outer surface of the tooth, develops from the ectodermal laye
GH GH GH GH GH GH GH GH GH GH GH GH GH
r of the embryo.
GH GH GH
DIF: Moderate GH
TOP: Tooth development MSCGH GH GH
: Multiple Choice
GH GH
8. The development of the face and oral cavity during embryonic development involves
GH GH GH GH GH GH GH GH GH GH GH GH
fusion of which structures? GH GH GH
A. Palatal shelves GH
B. Maxillary and mandibular processes GH GH GH
C. Frontal nasal process GH GH
D. Both B and C GH GH GH
, Answer: D. Both B and C GH GH GH GH GH
Rationale: The development of the face and oral cavity involves the fusion of the maxillar
GH GH GH GH GH GH GH GH GH GH GH GH GH GH
y and mandibular processes, as well as the frontal nasal process.
GH GH GH GH GH GH GH GH GH GH
DIF: Moderate GH
TOP: Facial development MSC
GH GH GH
: Multiple Choice
GH GH
9. Which structure is responsible for the formation of the teeth during embryonic
GH GH GH GH GH GH GH GH GH GH GH GH
development?
A. Neural crest GH
B. Ectoderm
C. Mesoderm
D. Endoderm
Answer: A. Neural crest GH GH GH
Rationale: The neural crest cells play a crucial role in the formation of the teeth during embryo
GH GH GH GH GH GH GH GH GH GH GH GH GH GH GH GH
nic development.
GH
DIF: Moderate GH
TOP: Tooth formation GH GH G
HMSC: Multiple Choic GH GH
e
10. The first indication of tooth development occurs during which week of embryonic
GH GH GH GH GH GH GH GH GH GH GH GH
development?
A. 2nd week GH
B. 5th week GH
C. 6th week GH
D. 7th week GH
Answer: C. 6th week GH GH GH
Rationale: The first indication of tooth development appears during the 6th week of embr
GH GH GH GH GH GH GH GH GH GH GH GH GH
yonic development, when the dental lamina forms.
GH GH GH GH GH GH
DIF: Moderate GH
TOP: Tooth development MSC
GH GH GH
: Multiple Choice
GH GH
11. The process of ossification refers to:
GH GH GH GH GH
A. The formation of blood cells GH GH GH GH
B. The formation of bone GH GH GH
C. The development of the skin GH GH GH GH
D. The development of the digestive system
GH GH GH GH GH
Answer: B. The formation of bone GH GH GH GH GH
Rationale: Ossification is the process by which bone tissue is formed from cartilage or ot
GH GH GH GH GH GH GH GH GH GH GH GH GH GH
her connective tissue.
GH GH
DIF: Moderate GH
TOP: Bone development GH GH GH
MSC: Multiple Choice GH GH
12. Which of the following is a key feature of the histological structure of enamel?
GH GH GH GH GH GH GH GH GH GH GH GH GH
A. It is composed of collagen fibers
GH GH GH GH GH
B. It is avascular and has no living cells
GH GH GH GH GH GH GH
C. It contains many blood vessels
GH GH GH GH
D. It has a high content of water
GH GH GH GH GH GH
