Exam (elaborations)
Test Bank for Modern Dental Assisting, 14th Edition by Debbie S. Robinson|9780323882422|Chapters 1-42|LATEST
Test Bank for Modern Dental Assisting, 14th Edition by Debbie S. Robinson|9780323882422|Chapters 1-42|LATEST
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Test Bank For Dental Assisting forp p p p p
Modern Dental Assisting 14th Edition
p p p p
Editors :
p
Jeffrey R. Smith & Debbie S. Robinson
p p p p p p
,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?
p p p p p p p p
A. Cleavage
B. Differentiation
C. Organogenesis
D. Implantation
Answer: A. Cleavage p p
Rationale: Cleavage is the series of rapid mitotic divisions that occur after fertilization,
p p p p p p p p p p p p
leading to the formation of a ball of cells known as the morula.
p p p p p p p p p p p p p
DIF: Easy p
TOP: Embryonic development
p p
MSC: Multiple Choice
p p p
2. During the first week of embryonic development, the fertilized egg becomes a structure
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called a:
p p
A. Zygote
B. Blastocyst
C. Morula
D. Embryo
Answer: B. Blastocyst p p
Rationale: After fertilization and cleavage, the ball of cells (morula) forms into a
p p p p p p p p p p p p
blastocyst, which implants into the uterine wall.
p p p p p p p
DIF: Easy p
TOP: Embryonic development
p p
MSC: Multiple Choice
p p p
3. The oral cavity begins to develop during which of the following stages of embryonic
p p p p p p p p p p p p p
development?
p
A. Zygote
B. Fetal
C. Pre-implantation
D. Embryonic
Answer: D. Embryonic p p
Rationale: The development of the oral cavity starts during the embryonic stage, around
p p p p p p p p p p p p
the third week of pregnancy, as the facial structures begin to form.
p p p p p p p p p p p p
DIF: Moderate p
TOP: Oral cavity development
p p p
MSC: Multiple Choice
p p p
4. The process by which the neural tube forms and begins to develop into the brain and
p p p p p p p p p p p p p p p
spinal cord is known as:
p p p p p
A. Gastrulation
B. Neurulation
C. Cleavage
D. Organogenesis
, Answer: B. Neurulation p p
Rationale: Neurulation is the process where the neural tube forms, which later gives rise
p p p p p p p p p p p p p
to the central nervous system (brain and spinal cord).
p p p p p p p p p
DIF: Moderate
p
TOP: Neural development
p p
MSC: Multiple Choice
p p p
5. Which of the following is the primary function of the mesoderm layer in embryonic
p p p p p p p p p p p p p
development?
p
A. Formation of the nervous system p p p p
B. Development of the skin and hair p p p p p
C. Formation of muscles, bones, and circulatory systems p p p p p p
D. Formation of the digestive system p p p p
Answer: C. Formation of muscles, bones, and circulatory systems
p p p p p p p p
Rationale: The mesoderm layer gives rise to structures such as muscles, bones, and the
p p p p p p p p p p p p p
circulatory system during embryonic development.
p p p p p
DIF: Moderate
p
TOP: Germ layers
p p p
MSC: Multiple Choicep p
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
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C. The structure of cells
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D. The development of embryos
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Answer: A. The structure and function of tissues
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Rationale: Histology is the study of tissues, including their structure and function, and
p p p p p p p p p p p p
their role in the body.
p p p p p
DIF: Easy p
pTOP:
Histology
p
MSC: Multiple Choicep p
7. The enamel of the tooth is derived from which embryonic tissue?
p p p p p p p p p p
A. Ectoderm
B. Mesoderm
C. Endoderm
D. Neural crest p
Answer: A. Ectoderm p p
Rationale: Enamel, the hard outer surface of the tooth, develops from the ectodermal
p p p p p p p p p p p p
layer of the embryo.
p p p p
DIF: Moderate
p
TOP: Tooth development
p p
MSC: Multiple Choice
p p p
8. The development of the face and oral cavity during embryonic development involves
p p p p p p p p p p p
fusion of which structures?
p p p p
A. Palatal shelves p
B. Maxillary and mandibular processes p p p
C. Frontal nasal process p p
D. Both B and C p p p
, Answer: D. Both B and C p p p p p
Rationale: The development of the face and oral cavity involves the fusion of the
p p p p p p p p p p p p p
pmaxillary and mandibular processes, as well as the frontal nasal process.
p p p p p p p p p p
DIF: Moderate
p
TOP: Facial development
p p
pMSC: Multiple Choice
p p
9. Which structure is responsible for the formation of the teeth during embryonic
p p p p p p p p p p p
pdevelopment?
A. Neural crest p
B. Ectoderm
C. Mesoderm
D. Endoderm
Answer: A. Neural crest p p p
Rationale: The neural crest cells play a crucial role in the formation of the teeth during
p p p p p p p p p p p p p p p
pembryonic development. p
DIF: Moderate
p
TOP: Tooth formation
p p
pMSC: Multiple p
pChoice
10. The first indication of tooth development occurs during which week of embryonic
p p p p p p p p p p p
pdevelopment?
A. 2nd week p
B. 5th week p
C. 6th week p
D. 7th week p
Answer: C. 6th week p p p
Rationale: The first indication of tooth development appears during the 6th week of
p p p p p p p p p p p p
pembryonic development, when the dental lamina forms.
p p p p p p
DIF: Moderate
p
TOP: Tooth development
p p
pMSC: Multiple Choice
p p
11. The process of ossification refers to:
p p p p p
A. The formation of blood cells
p p p p
B. The formation of bone
p p p
C. The development of the skin
p p p p
D. The development of the digestive system
p p p p p
Answer: B. The formation of bone
p p p p p
Rationale: Ossification is the process by which bone tissue is formed from cartilage or
p p p p p p p p p p p p p
pother connective tissue.
p p
DIF: Moderate
p
TOP: Bone development
p p
pMSC: Multiple Choice
p p
12. Which of the following is a key feature of the histological structure of enamel?
p p p p p p p p p p p p p
A. It is composed of collagen fibers
p p p p p
B. It is avascular and has no living cells
p p p p p p p
C. It contains many blood vessels
p p p p
D. It has a high content of water
p p p p p p
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