Deck 8: Embryology and Histology

Question 1

The development of different tissues is known as ______________.

A) histodifferentiation
B) cytodifferentiation
C) morphodifferentiation
D) calcification

Answer 1

histodifferentiation

Question 2

Histology is defined as the study of the microscopic structure and function of tissues.

Answer 2

True

Question 3

The study of prenatal growth and the developing process of an individual is the science of embryology.

Answer 3

True

Question 4

The face begins to form during which week of prenatal development?

A) Second
B) Fourth
C) Sixth
D) Twelfth

Question 5

During which phase of pregnancy do the cells proliferate?

A) Zygote
B) Embryo
C) Fetus
D) None of the above

Question 6

Only enamel has developmental marks.

Question 7

The cementum is part of the periodontium as well as the last tooth structure.

Question 8

The lining of the digestive tract is formed from which layer?

A) Ectoderm
B) Endoderm
C) Mesoderm
D) Both a and c

Question 9

The second trimester of pregnancy includes 13 to 28 weeks.

Question 10

If the antibiotic tetracycline is taken during the tooth's formation period, it will cause permanent staining.

Question 11

The bones, muscles, internal organs, dentin, cementum, and pulp of the teeth are formed from which layer?

A) Ectoderm
B) Endoderm
C) Mesoderm
D) Both a and c

Question 12

The skin, nails, brain, lining of the oral cavity, and the enamel of the teeth are formed from which layer?

A) Ectoderm
B) Endoderm
C) Mesoderm
D) Both a and b

Question 13

The development of different cells is known as _________________.

A) histodifferentiation
B) cytodifferentiation
C) morphodifferentiation
D) initiation

Question 14

The hardest living tissue in the body is cementum.

Question 15

Another name for the primitive mouth that appears between the maxillary and mandibular processes is the _____________.

A) shallow depression
B) brachial arches
C) stomedeum
D) There is no such thing as a primitive mouth.

Question 16

The development of different forms is known as _______________.

A) histodifferentiation
B) cytodifferentiation
C) morphodifferentiation
D) deposition

Question 17

If the maxillary processes fail to fuse together with the medial nasal process, what is the result?

A) Cleft lip
B) Cleft palate
C) Cleft lip and palate
D) Cleft uvula

Question 18

Healthy gingiva has a shiny, slick surface.

Question 19

If a tooth is traumatized due to force from the occlusal or incisal surface, a condition known as hypercementosis may take place.

Question 20

Failure of the palatal shelves to fuse results in a _____________.

A) cleft lip
B) cleft palate
C) cleft lip and palate
D) cleft uvula

Question 21

As a person ages, the pulpal portion may ________ in size.

A) decrease
B) increase
C) remain the same
D) double

Question 22

Which condition(s) is (are) considered to be least problematic for the infant?

A) Cleft lip
B) Cleft palate
C) Cleft lip and palate
D) Cleft uvula

Question 23

The process of depositing calcium salts and other minerals necessary for a properly formed tooth is termed ____________.

A) eruption
B) calcification
C) attrition
D) resorption

Question 24

What is the name of the growth from the oral epithelium that gives rise to the tooth buds?

A) Dental sac
B) Dental lamina
C) Mesenchyme
D) None of the above

Question 25

The tissue that covers the root is __________.

A) dentin
B) enamel
C) cementum
D) pulp

Question 26

The bulk of the tooth structure is composed of ____________.

A) dentin
B) enamel
C) cementum
D) pulp

Question 27

When a primary tooth is loosened, what happens to the roots?

A) Evanescence
B) Calcification
C) Attrition
D) None of the above

Question 28

Dentin-forming cells are called __________.

A) ameloblasts
B) odontoblasts
C) cementoblasts
D) none of the above

Question 29

Place in correct order the stages of development in the origin of a tooth.
1) Bud stage
2) Cap stage
3) Bell stage
4) Maturation stage

A) 1, 2, 3, 4
B) 2, 3, 1, 4
C) 1, 3, 2, 4
D) 3, 2, 1, 4

Question 30

The final stage in the life cycle of a tooth is __________.

A) eruption
B) calcification
C) attrition
D) resorption

Question 31

The thin covering over enamel on newly erupted primary teeth, which may stain very easily, is called ____________.

A) neonatal lines
B) imbrication lines
C) lines of Retzius
D) Nasmyth's membrane

Question 32

Cementum-forming cells are called ___________.

A) ameloblasts
B) odontoblasts
C) cementoblasts
D) none of the above

Question 33

What is the best guide for an erupting permanent tooth?

A) No guide is needed
B) Primary tooth
C) Space maintainer
D) None of the above

Question 34

When the cells of a developing tooth multiply, it is termed ____________.

A) proliferation
B) histodifferentiation
C) morphodifferentiation
D) initiation

Question 35

The development lines that appear as incremental lines around the layers of enamel are known as ___________.

A) neonatal lines
B) perikymata
C) lines of Retzius
D) imbrication lines

Question 36

During the formation of a tooth, connective tissue will form an enclosed area within which dentin, cementum, and pulp form. What is the name of this enclosed area?

A) Dental lamina
B) Dental sac
C) Lamina dura
D) None of the above

Question 37

When the cells begin to outline the future shape of the developing tooth, it is termed _________.

A) proliferation
B) histodifferentiation
C) morphodifferentiation
D) calcification

Question 38

What is responsible for the laying down of each enamel matrix?

A) Enamel matrix
B) Tomes' process
C) Either a or b
D) Neither a nor b

Question 39

When the cells of a developing tooth develop into different tissues, it is termed ____________.

A) proliferation
B) histodifferentiation
C) morphodifferentiation
D) calcification

Question 40

Enamel-forming cells are called __________.

A) ameloblasts
B) odontoblasts
C) cementoblasts
D) none of the above

Question 41

At the floor of the gingival sulcus is the ____________.

A) alveolar crest
B) interdental papilla
C) attached gingiva
D) epithelial attachment

Question 42

Which tooth tissue gives the tooth its sensory function?

A) Pulp
B) Enamel
C) Cementum
D) Dentin

Question 43

During week ____ of fetal development, the tooth buds appear.

A) 8
B) 11
C) 9
D) 10

Question 44

The bone that surrounds the root of the tooth is the ______________.

A) alveolar crest
B) alveolus
C) interradicular septum
D) interdental septum

Question 45

The type of dentin that forms after completion of the apical foramen and slowly throughout the life of the tooth is

A) Secondary
B) Intertubular
C) Mantle
D) Peritubular

Question 46

The maximum depth of sulcus should not exceed ____ mm.

A) 1
B) 2
C) 3
D) 4

Question 47

Which are the clinical appearances of inflamed gingiva?
1) Shiny surface
2) Stippled surface
3) Swelling
4) Firmness
5) Pink color
6) Red color

A) 2, 4, 5
B) 1, 3, 5
C) 2, 3, 6
D) 1, 3, 6

Question 48

An overgrowth of gingival tissue due to a certain type of drug is known as ___________.

A) gingival hypoplasia
B) gingival hyperplasia
C) either a or b
D) neither a nor b

Question 49

Interdental papilla is an extension of ________ gingiva between adjacent teeth.

A) unattached
B) attached
C) either a or b
D) neither a nor b

Question 50

What gives some teeth a yellow tone?

A) Yellow enamel
B) Dentin showing under translucent enamel
C) Cementum being exposed
D) None of the above

Question 51

Which type of dentin creates the wall of the dentinal tubule?

A) Secondary
B) Intertubular
C) Mantle
D) Peritubular

Question 52

Trimesters measure the stages of pregnancy and when disturbances could occur. The first trimester could have one of these signs or symptoms.

A) Woman feels the baby moving
B) Nausea and vomiting
C) Fetus is recognizable
D) Woman's heart rate increases

Question 53

Usually, the cementum is thickest at which portion of the root?

A) Cervical third
B) Middle third
C) Apical third
D) It has the same thickness throughout the tooth.

Question 54

The area where two cortical plates come together between two teeth is the __________.

A) alveolar crest
B) alveolus
C) interradicular septum
D) interdental septum

Question 55

What secures the tooth into the socket by a number of organized fiber groups?

A) Alveolar crest
B) Lamina dura
C) Periodontal ligaments
D) Interdental septum

Question 56

Which type of dentin is formed as a reaction to irritation, such as caries or attrition?

A) Secondary
B) Tertiary
C) Mantle
D) Peritubular

Question 57

During week ____ of fetal development, the palate and tongue form.

A) 5
B) 6
C) 7
D) 9

Question 58

Which type of dentin is formed before the completion of the apical foramen and forms the bulk of the tooth?

A) Secondary
B) Intertubular
C) Primary
D) Peritubular

Question 59

How many weeks elapse from the first day of the pregnant woman's last period?

A) 32
B) 28
C) 40
D) 35

Question 60

In multirooted teeth, the area of bone between the roots is the ______________.

A) alveolar crest
B) alveolus
C) interradicular septum
D) interdental septum

Question 65

During week ____ of fetal development, the swallowing reflex is present.

A) 12
B) 10
C) 9
D) 11