Cleft lip can be defined as:

Part/Comp failure of fusion of 1 or both max processes with globular proces

What is the order of root formation cycle?

Formation of dentin> lengthening of root> deposition of cementum

Select the correct order of stages of tooth development.

Bud, cap, bell, dentinogenesis, amelogenesis, cr. formation, rt formation

The Maxilla comes from the 1st branchial arch. The mandible comes from the 2nd branchial arch.

The first statement is correct. The second statement is incorrect

Which prenatal period is involved in the 1st trimester?

Pre-implantation period & embryonic period

The centre of the upper lip arises from:

Fusion of 2 medial nasal processes

Name the 3 groups of fibers in the PDL

Gingival fiber group, alveolodental ligament, transeptal ligament

Lamina dura is defined as:

Alveolar bone proper, lines the tooth socket

When tooth movement occurs:

Osteoblasts & Osteoclasts are activated

Spaces between lamellae where osteocytes are embedded

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Histology & Embryology Final Exam Review

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Questions 75

Answers

1
Which papillae have no taste buds?
Fungiform
Foliate
Circumvallate
Filiform
2
Describe simple cuboidal epithelium?
Found in the ducts of salivary glands
All of the above
One layer
Cube-like cells
3
Periodontal Ligament...
Acts as shock absorber
Has blood vessels and nerves
All of the above
Contains proprioceptive mechanism
4
What structures make up the hard palate?
Left palatine process
The globular process
All of the above
Right palatine process
5
Ameloblasts go through several functional stages. Which is incorrect?
Maturation
Attachment
Secretion
Morphogenesis
6
Enamel comes from which embryonic layer?
Ectoderm
Endoderm
None of the above
Mesoderm
7
Cementum formation....
Is ongoing throughout life
Stops at 2 years of age
Begins at 2 years of age
Occurs during the first 4 weeks in utero
8
What type of saliva is clear, watery, with protein?
Merocrine
Serous
Mixed
Mucous
9
When does the tongue start to develop?
4 weeks
7 weeks
10 weeks
3 weeks
10
What type of epithelium is the oral mucosa composed of?
Non-stratified squamous epithelium
Pseudostratified columnar epithelium
Stratified squamous epithelium
Keratinized epithelium
11
Which embryonic layer produces the Alveolar process?
Ectoderm
Mesoderm
Endoderm
None of the above
12
Meckel's cartilage is important in the formation of the maxilla
False
True
13
Which of the following is not present in a tooth germ?
Pulp canal
Dental Papilla
Enamel organ
Dental sac
14
What percent of saliva is produced by Major Salivary Glands?
90%
70%
5%
1%
15
What produces approximately 10% of total salivary volume?
Sublingual glands
Submandibular glands
Parotid glands
Major salivary glands
16
Cleft lip can be defined as:
Failure of the fusion of the premaxilla
None of the above
Part/Comp failure of fusion of 1 or both max processes with globular proces
Failure of lateral palatine processes to fuse together
17
What is the most common cell within the PDL?
Cementoblast
Fibroblast
Osteoclast
Odontoblast
18
Periodontal ligament fibers gain their natural orientation after the teeth are in functional occlusion
False
True
19
What is the order of root formation cycle?
Lengthening of root> formation of dentin> deposition of cementum is ongoing
Deposition of cementum is ongoing> formation of dentin> lengthening of root
Formation of dentin> deposition of cementum ongoing> lengthening of root
Formation of dentin> lengthening of root> deposition of cementum
20
Select the correct order of stages of tooth development.
Bud, dentinogenesis, function, crown formation, root formation, bell
Bud, cap, bell, dentinogenesis, amelogenesis, cr. formation, rt formation
All of the above
Dentinogenesis, bell, cr formation, root formation, bud, cap, amelogenesis
21
Which salivary gland is located anterior & inferior to the ear, between the skin of the cheek & masseter muscle?
Bartholins gland
Parotid gland
Submandibular gland
Sublingual gland
22
The Maxilla comes from the 1st branchial arch. The mandible comes from the 2nd branchial arch.
Both statements are correct
The first statement is correct. The second statement is incorrect
The first statement is incorrect. The second statement is correct
Both statements are incorrect
23
Sometimes odontoblastic processes pass across the DEJ into enamel and become trapped. These are called....
Enamel Spindles
Enamel Junction
Enamel Rods
Enamel tufts
24
Which prenatal period is involved in the 1st trimester?
Fetal period only
None of the above
Pre-implantation period & embryonic period
Embryonic period & fetal period
25
The 2 layers that make up the basal lamina are the lamina Lucida and reticular lamina
False
True
26
What covers the floor of the mouth, buccal, labial, alveolar, ventral surface of tongue & soft palate?
Lining Mucosa
Keratinized mucosa
Specialized mucosa
Masticatory mucosa
27
The centre of the upper lip arises from:
Nasal septum
Primitive mouth
Fusion of 2 medial nasal processes
Fusion of 2 palatine shelves
28
Name the 3 groups of fibers in the PDL
Alveolodental ligament, circumpapillae, gingival fiber group
Alveolodental ligament, cementoblastic, transeptal ligament
Gingival fiber group, alveolodental ligament, transeptal ligament
Cementoblastic, alveolodental ligament, gingival fiber group
29
These concentric series of bands represent incremental growth lines extending from the DEJ
Demarcation bands
Nasmith's Membrane
Neonatal line
Lines of Retzius
30
Dentin is formed only during the maturation stage
False
True
31
Lamina dura is defined as:
Coronal border of the alveolar proess
Alveolar bone proper, lines the tooth socket
Spaces in between the teeth
Bone loss in coronal area of the root
32
The area of bone loss where an apical root penetrates the cortical bone like a window is called___
Fenestration
Lamina dura
Alveolar crest
Dehiscence
33
Which duct opens under the tongue near the frenum at the sublingual caruncle?
Both Blue & Yellow
Stenson's Duct
Wharton's Duct
Bartholin's Duct
34
Pitting of enamel because of poor matrix formation is caused by:
Dental Fluorosis
Decalcification
Hypocalcification
Hypoplasia
35
When tooth movement occurs:
None of the above
Only Osteoclasts are activated
Osteoblasts & Osteoclasts are activated
Only osteoblasts are activated
36
Where are the Von Ebner's Salivary glands located?
Circumvallate Papillae
Filiform Papillae
Fungiform Papillae
All of the above
37
Where is cellular (secondary) cementum the thickest?
Equal thickness on he entire root surface
On the crown
At the apex of the root
At the CEJ
38
Meckel's cartilage is found in which branchial arch?
2nd
1st
Maxillary
Lateral nasal
39
Stratum corneum is found in Stratified Squamous Keratinized Epithelium
False
True
40
What is the highest point of the alveolar ridge & joins the facial & lingual cortical plates?
Cortical plate
trabecular bone
Alveolar process
Alveolar crest
41
________ develop on inner surface of enamel organ (IEE)
Cementocytes
Ameloblasts
Osteoblasts
Odontoblasts
42
Wearing away of tooth structure from ordinary forces of occlusion is called...
Abraision
Abfraction
Attrition
Erosion
43
In what stage of tooth development does the enamel organ form?
Initiation
Bud
Cap
Bell
44
The primitive mouth starts to form at :
6 weeks
8 weeks
10 weeks
4 weeks
45
What type of bone lies within the max. & mand. & has a web-like appearance on radiographs?
Trabecular bone
Alveolar crest
Cortical plate
Lamina Dura
46
The alveolodental ligament fiber group includes all fibers except ________?
Interradicular
Oblique
Dentinogingival
Alveolar crest
47
The primary dentition is initiated at
10 weeks
1 week
6 weeks
4 weeks
48
Chalky areas that are unmineralized due to acids or poor OH are caused by ....
Too little fluoride
Hypocalcification
Too much fluoride intake
Decalcification
49
What is the lacuna?
Same as Haversian canal
Central vascular canal within each osteon
Anchors periosteum to bone
Spaces between lamellae where osteocytes are embedded
50
Which type of junctions bind cells together by creating "spot welds" between adjacent membranes?
Gap Junctions
Hemidesmosomes
Desmosomes
Tight Junctions
51
What lines can be seen with the naked eye on the cervical 2/3 of the crown?
Enamel Spindles
Enamel Tufts
Hunter Schräeger Bands
Perikymata
52
Cementum is located on top of Tome's granular in______
Alveolar bone
Dentin
Periodontal Ligament
Enamel
53
Cementum is composed of :
Mineralized fibrous matrix & cells
Mineralized fibrous matrix & Sharpeys fibers
Mineralized fibrous matrix & collagen fibers
Mineralized fibrous matrix & cementoid
54
In what week does the primary palate & bilateral palatine processes fuse?
12 weeks
4-8 weeks
6-12 weeks
5-6 weeks
55
What percent of total saliva volume does the submandibular gland produce?
60-65%
25-30%
5%
10-15%
56
Define Fusion
When 2 developing teeth fuse into 1 tooth during cap stage
When 2 crowns develop form 1 bud during cap stage
When teeth are big
When teeth are small
57
Define Gemination
When 2 crowns develop from 1 bud during cap stage
When 2 developing teeth fuse into 1 tooth, during cap stage
When teeth are big
When teeth are small
58
Which of these locations does not have keratinized stratified squamous epithelium?
Tonsils
Hard Palate
Soft Palate
Attached gingiva
59
The fertilized egg is called a zygote
False
True
60
Osteon is .....
All of the above
Unit of structure in compact bone
Composed of lamellae
Contains Haversion canals
61
Alveolar mucosa is non-keratinized.
False
True
62
Function of Fibroblasts is to:
Function as phagocytes
Important in fighting infection
Release heparin
Synthesize certain types of protein fibers
63
The Basement membrane is located between the epithelium & connective tissue.
False
True
64
Development of the tongue takes place in weeks___
14-18
4-8
5-12
1-4
65
Loss of tooth structure at the cervical area of teeth that is often wedge shaped is called....
Abfraction
Attrition
Erosion
Abrasion
66
When does the cap stage occur?
9-10 weeks
10-12 weeks
8-9 weeks
none of the above
67
What contains adipose tissue and minor salivary glands?
Floor of the mouth
Tongue
Cheeks
GI tract
68
Tonsils main function is production of Phagocytes
False
True
69
The tongue forces the developing palatal shelves to "flip up", move toward each other & merge to form the primary palate
False
True
70
Leeway space is created in the arches by the replacement of larger primary molars by smaller permanent premolars
False
True
71
What is the name of the median swelling that develops part of the tongue?
Nasal Septum
Tuberculum impar
Intermaxillary segment
Stomodeum
72
Which of the following is not a cranial bone?
Frontal
Temporal
Occipital
Hyoid
73
Which statement about Thyroid gland is true?
Largest endocrine gland
Secretes hormone thyroxine
All of the above
Located below the larynx
74
Root formation begins Before the crown completely forms. HERS consist of only IEE & OEE.
Both statements are false
1st statement true, 2nd statement is false
Both statements are true
1st statement is false, 2nd statement is true
75
Which is the correct sequence of embryonic period?
Induction, proliferation, dilaceration, maturation, morphogenesis
Morphogenesis, proliferation, differentiation, induction, maturation
Maturation, induction, morphogenesis, differentiation
Induction, proliferation, differentiation, morphogenesis, maturation

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