test bank for Modern Dental Assisting 14th Edition by Debbie S. Robinson
Easily master all aspects of dental assisting with the most up-to-date and trusted text available. For more than 45 years, students and practitioners alike have relied on Modern Dental Assisting for its cutting-edge content, easy-to-grasp writing style, step-by-step procedures, and top-notch visuals. And the new 14th edition is no exception. With updated content — including the latest technological advancements, clinical photographs, and coverage of cultural diversity and how it relates to patient care — this new edition will guide you from your first day of class all the way to your first job in dental assisting.
Chapter 1. Oral Embryology and Histology
1. Which of the following is the process by which the cells of the fertilized egg divide and
form a ball of cells during embryonic development?
A. Cleavage
B. Differentiation
C. Organogenesis
D. Implantation
Answer: A. Cleavage
Rationale: Cleavage is the series of rapid mitotic divisions that occur after fertilization,
leading to the formation of a ball of cells known as the morula.
DIF: Easy
TOP: Embryonic development
MSC: Multiple Choice
2. During the first week of embryonic development, the fertilized egg becomes a structure
called a:
A. Zygote
B. Blastocyst
C. Morula
D. Embryo
Answer: B. Blastocyst
Rationale: After fertilization and cleavage, the ball of cells (morula) forms into a
blastocyst, which implants into the uterine wall.
DIF: Easy
TOP: Embryonic development
MSC: Multiple Choice
3. The oral cavity begins to develop during which of the following stages of embryonic
development?
A. Zygote
B. Fetal
C. Pre-implantation
D. Embryonic
Answer: D. Embryonic
Rationale: The development of the oral cavity starts during the embryonic stage, around
the third week of pregnancy, as the facial structures begin to form.
DIF: Moderate
TOP: Oral cavity development
MSC: Multiple Choice
4. The process by which the neural tube forms and begins to develop into the brain and
spinal cord is known as:
A. Gastrulation
B. Neurulation
C. Cleavage
D. Organogenesis
