Test Bank – Modern Dental Assisting (14th Edition, Smith & Robinson) | Verified Questions & Answers | All Chapters Included

TEST BANK

,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

, Answer: B. Neurulation
Rationale: Neurulation is the process where the neural tube forms, which
later gives rise to the central nervous system (brain and spinal cord).
DIF: Moderate
TOP: Neural development
MSC: Multiple Choice
5. Which of the following is the primary function of the mesoderm layer
in embryonic development?
A. Formation of the nervous system
B. Development of the skin and hair
C. Formation of muscles, bones, and circulatory systems
D. Formation of the digestive system
Answer: C. Formation of muscles, bones, and circulatory systems
Rationale: The mesoderm layer gives rise to structures such as muscles, bones,
and the circulatory system during embryonic development.
DIF: Moderate
TOP: Germ
layers
MSC: Multiple Choice
6. The term "histology" refers to the study of:
A. The structure and function of tissues
B. The development of organs
C. The structure of cells
D. The development of embryos
Answer: A. The structure and function of tissues
Rationale: Histology is the study of tissues, including their structure and
function, and their role in the body.
DIF: Easy
TOP:
Histology
MSC: Multiple Choice