Multiple Choice Questions

Question 1

During which period of prenatal development would the heart begin to beat?
A. Fetal period
B. Embryonic period
C. Proliferative period
D. Gestational period

Answer 1

B. Embryonic period

Question 2

Once the genetic material of the sperm and egg are united, the egg is then called ___________.
A. Fetus
B. Zygote
C. Implantation
D. Fertilization

Answer 2

B. Zygote

Question 3

Which cells will be responsible for forming the gastrointestinal tract?
A. Epidermal cells
B. Ectodermal cells
C. Mesodermal cells
D. Endodermal cells

Answer 3

D. Endodermal cells

Question 4

After the morula increases in size, becomes hollow and starts to develop a small inner cell mass it is then called a ________.
A. Blastocyst
B. Embryoblast
C. Neural plate
D. Embryonic disk

Answer 4

A. Blastocyst

Question 5

What provide pigment to the skin?
A. Somites
B. Melanocytes
C. Myelin sheaths
D. Morulas

Answer 5

B. Melanocytes

Question 6

What makes up the initial skeletal component in the embryo?
A. Hemoglobin
B. Osteoblasts
C. Cartilage
D. Neuroblasts

Answer 6

C. Cartilage

Question 7

Which of the following is NOT true regarding the teratogenic factors during embryonic development?
A. Most susceptible during the 2nd-3rd week after conception
B. Alcohol consumption is a teratogenic factor
C. Most susceptible during the 3rd-8th week after conception
D. Smoking/drug consumption are teratogenic factors

Answer 7

A. Most susceptible during the 2nd-3rd week after conception

Question 8

Tooth enamel is formed from?
A. Ectoderm
B. Mesoderm
C. Endoderm
D. Exoderm

Answer 8

A. Ectoderm

Question 9

Pick the three types of muscle groups based on the groups below.
A. Striated, smooth, skeletal
B. Skeletal, striated, cardiac
C. Smooth, striated, cardiac
D. Cardiac, smooth, skeletal

Answer 9

D. Cardiac, smooth, skeletal

Question 10

The study of prenatal development, from conception to birth is termed histology. The study of microscopic structure and function of tissues is termed embryology.
A. Both statements are true
B. Both statements are false
C. First statement is true. Second statement is false.
D. First statement is false. Second statement is true.

Answer 10

B. Both statements are false

Question 11

Which significant change occurs in the fifth prenatal week?
A. The palatine shelves grow medically and contact the tongue
B. The bilateral placodes develop into nostrils
C. The eyes move from the side of the face to the front of the face
D. The heart begins to beat

Answer 11

B. The bilateral placodes develop into nostrils

Question 12

Which muscle grows around the oral pit in the sixth prenatal week?
A. Orbicularis oris
B. Buccinator
C. Mylohyoid
D. Zygomatic major

Answer 12

A. Orbicularis oris

Question 13

The thyroid gland descends to the front of the trachea, attached to the tongue by the thyroglossal __________.
A. Swelling
B. Cyst
C. Duct
D. Fistula

Answer 13

C. Duct

Question 14

Which best defines the term fusion?
A. A merging of adjacent tissues during orofacial development
B. The enzymatic action that results in self-destruction
C. The period of growth in which the face becomes recognizably human
D. A separation of tissues

Answer 14

A. A merging of adjacent tissues during orofacial development

Question 15

Palatal development occurs during the _________ weeks of gestation.
A. First to third
B. Fourth to sixth
C. Seventh to ninth
D. Tenth to twelfth

Answer 15

C. Seventh to ninth

Question 16

The second pharyngeal arch is also known as the _________ arch.
A. Hyoid
B. Mandibular
C. Maxillary
D. Oral pit

Answer 16

A. Hyoid

Question 17

The oral and nasal cavities are separated by the
A. Nasal septum
B. Anterior nasal spine
C. Alveolar bone
D. Palate

Answer 17

D. Palate

Question 18

The thyroid gland originates from
A. The palatine shelves
B. Foramen cecum
C. The auricular hillocks
D. Muscles of the occipital myotomes

Answer 18

B. Foramen cecum

Question 19

The word for programmed cell death during palatal shelf elevation and closure is
A. Migration
B. Lysis
C. Apoptosis
D. Merging

Answer 19

C. Apoptosis

Question 20

Development of the upper lip depends on fusion of what two processes?
A. Medial nasal process and two lateral maxillary segments
B. Lateral nasal process and medial nasal process
C. Oronasal groove and lateral nasal process
D. Nasal fin and philtrum

Answer 20

A. Medial nasal process and two lateral maxillary segments

Question 21

The stages of tooth development occur in which order?
A. Cap, bell, bud
B. Bud, cap, bell
C. Bell, bud, cap
D. Bud, bell, cap

Answer 21

B. Bud, cap, bell

Question 22

Odontoblasts are derived from which type of cell?
A. Neural crest
B. Ectodermal
C. Oral epithelial
D. Follicular

Answer 22

A. Neural crest

Question 23

___________ operates as a blueprint or pattern to guide root formation.
A. Reduced enamel epithelium
B. Tomes process
C. Hertwig’s epithelial root sheath
D. Periodontal ligaments

Answer 23

C. Hertwig’s epithelial root sheath

Question 24

Which cells of the enamel organ assist ameloblasts in forming enamel?
A. Stellate reticulum
B. Stratum intermedium
C. Outer enamel epithelial
D. Inner enamel epithelial

Answer 24

B. Stratum intermedium

Question 25

Which two cellular layers fuse to form the root sheath? A. Cementoid and epithelial rest cells B. Ameloblast and odontoblast cells C. Stratum intermedium and stellate reticulum D. Inner and outer enamel epithelial cells

Answer 25

D. Inner and outer enamel epithelial cells

Question 26

Which permanent tooth forms from the general lamina? A. Canine B. Molar C. Incisor D. Premolar

Answer 26

B. Molar

Question 27

The periodontal ligament attaches which two surfaces? A. Cementum and free gingiva B. Cementum and attached gingiva C. Alveolar bone and cementum D. Alveolar bone and enamel

Answer 27

C. Alveolar bone and cementum

Question 28

T/F: Precursor odontoblast cells use cell signaling to determine the correct starting position.

Answer 28

True

Question 29

Under normal development, you would expect 24 primary teeth. Under normal development, you would expect 32 permanent teeth. A. Both statements are true. B. Both statements are false. C. First statement is true. Second statement is false. D. First statement is false. Second statement is true.

Answer 29

D. First statement is false. Second statement is true.

Question 30

T/F: Primary teeth begin development at birth.

Answer 30

False