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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 forb b b b b
Modern Dental Assisting 14th Edition
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Editors :
b
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 b b
Rationale: Cleavage is the series of rapid mitotic divisions that occur after fertilization,
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leading to the formation of a ball of cells known as the morula.
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DIF: Easy b
TOP: Embryonic development
b b
MSC: Multiple Choice
b b b
2. During the first week of embryonic development, the fertilized egg becomes a structure
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called a:
b b
A. Zygote
B. Blastocyst
C. Morula
D. Embryo
Answer: B. Blastocyst b b
Rationale: After fertilization and cleavage, the ball of cells (morula) forms into a
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blastocyst, which implants into the uterine wall.
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DIF: Easy b
TOP: Embryonic development
b b
MSC: Multiple Choice
b b b
3. The oral cavity begins to develop during which of the following stages of embryonic
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development?
b
A. Zygote
B. Fetal
C. Pre-implantation
D. Embryonic
Answer: D. Embryonic b b
Rationale: The development of the oral cavity starts during the embryonic stage, around
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the third week of pregnancy, as the facial structures begin to form.
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DIF: Moderate b
TOP: Oral cavity development
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MSC: Multiple Choice
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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:
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A. Gastrulation
B. Neurulation
C. Cleavage
D. Organogenesis
, Answer: B. Neurulation b b
Rationale: Neurulation is the process where the neural tube forms, which later gives rise
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to the central nervous system (brain and spinal cord).
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DIF: Moderate
b
TOP: Neural development
b b
MSC: Multiple Choice
b b b
5. Which of the following is the primary function of the mesoderm layer in embryonic
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development?
b
A. Formation of the nervous system b b b b
B. Development of the skin and hair b b b b b
C. Formation of muscles, bones, and circulatory systems b b b b b b
D. Formation of the digestive system b b b b
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
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circulatory system during embryonic development.
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DIF: Moderate
b
TOP: Germ layers
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MSC: Multiple Choiceb b
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
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their role in the body.
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DIF: Easy b
bTOP:
Histology
b
MSC: Multiple Choiceb b
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 b
Answer: A. Ectoderm b b
Rationale: Enamel, the hard outer surface of the tooth, develops from the ectodermal
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layer of the embryo.
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DIF: Moderate
b
TOP: Tooth development
b b
MSC: Multiple Choice
b b b
8. The development of the face and oral cavity during embryonic development involves
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fusion of which structures?
b b b b
A. Palatal shelves b
B. Maxillary and mandibular processes b b b
C. Frontal nasal process b b
D. Both B and C b b b
, Answer: D. Both B and C b b b b b
Rationale: The development of the face and oral cavity involves the fusion of the
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bmaxillary and mandibular processes, as well as the frontal nasal process.
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DIF: Moderate
b
TOP: Facial development
b b
bMSC: Multiple Choice
b b
9. Which structure is responsible for the formation of the teeth during embryonic
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bdevelopment?
A. Neural crest b
B. Ectoderm
C. Mesoderm
D. Endoderm
Answer: A. Neural crest b b b
Rationale: The neural crest cells play a crucial role in the formation of the teeth during
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bembryonic development. b
DIF: Moderate
b
TOP: Tooth formation
b b
bMSC: Multiple b
bChoice
10. The first indication of tooth development occurs during which week of embryonic
b b b b b b b b b b b
bdevelopment?
A. 2nd week b
B. 5th week b
C. 6th week b
D. 7th week b
Answer: C. 6th week b b b
Rationale: The first indication of tooth development appears during the 6th week of
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bembryonic development, when the dental lamina forms.
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DIF: Moderate
b
TOP: Tooth development
b b
bMSC: Multiple Choice
b b
11. The process of ossification refers to:
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A. The formation of blood cells
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B. The formation of bone
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C. The development of the skin
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D. The development of the digestive system
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Answer: B. The formation of bone
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Rationale: Ossification is the process by which bone tissue is formed from cartilage or
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bother connective tissue.
b b
DIF: Moderate
b
TOP: Bone development
b b
bMSC: Multiple Choice
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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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