Test 2 -Oral Cavity - Histology

Front 1

What is the space between the lips, cheeks, and teeth?

Back 1

Vestibule

Front 2

What is included with the oral cavity proper?

Back 2

anything behind the teeth: hard and soft palates, tongue and floor of the mouth, entrance into the oropharynx

Front 3

What is the oral cavity superior?

Back 3

hard and soft palates

Front 4

What is included with the oral cavity proper, inferior?

Back 4

tongue and floor of the mouth

Front 5

What in included with the oral cavity proper, posterior?

Back 5

entrance into the oropharynx

Front 6

What are the two types of mucosa found in the oral cavity

Back 6

Masticatory and Lining Mucosa

Front 7

What mucosa includes a keratinized stratified squamous epithelium?

Back 7

Masticatory Mucosa

Front 8

Where is masticatory mucosa found?

Back 8

Gingiva and Hard Palate

Front 9

Why would you need keratinized st. sq. epithelium in the gingiva and hard palate?

Back 9

because of friction when chewing = the surface is more keratinzed for protection

Front 10

What type of tissue is found in lining mucosa?

Back 10

NON keratinized stratified squamous epithelium

Front 11

where is non kertainized st. sq. epithelium found in the oral cavity

Back 11

inner lips, floor of the mouth, inferior tongue, soft palate - so you can slip things right by!

Front 12

______ are elevations of mucosa found on the surface of the tongue.

Back 12

papillae

Front 13

What are the smallest and most numerous papillae found on the tongue?

Back 13

Filiform

Front 14

What papillae are conical, elongated and projections of CT with keratinized stratified sq. epithelial coverings?

Back 14

Filiform papillae

Front 15

T/F Filiform Papillae contain taste buds.

Back 15

False

Front 16

What do filiform papillae mainly provide?

Back 16

friction

Front 17

What papillae are taller than filiform, scattered, just visible to the naked eye, more numerous near the tip, and appear as red dots on the tongue?

Back 17

Fungiform papillae

Front 18

T/F fungiform papillae contain taste buds

Back 18

True

Front 19

Why do fungiform papillae appear as red dots on the tongue?

Back 19

highly vascularized

Front 20

What papillae are large, dome-shaped structures just anterior to the sulcus terminalis?

Back 20

Circumvallate papillae

Front 21

How many circumvallate papillae are present in humans?

Back 21

8-10

Front 22

What papillae is surrounded by invagination containing serous (von Ebner's) glands that flush material from the gland?

Back 22

circumvallate

Front 23

What purpose do the large invaginations surrounding circumvallate papillae have?

Back 23

when material is flushed it allow the taste buds to respond quickly to stimuli

Front 24

T/F circumvallate papillae have taste buds

Back 24

True

Front 25

what papillae have parallel low ridges separated by clefts?

Back 25

Foliate papillae

Front 26

Where are foliate papillae found on the tongue?

Back 26

lateral edges of the tongue

Front 27

Do foliate papillae have taste buds?

Back 27

yes

Front 28

T/F All papillae have taste buds

Back 28

False - filiform don't have taste buds

Front 29

What are found along the lateral walls of circumvallate papillae within the clefts?

Back 29

taste buds

Front 30

What neuroepithelial structure is oval, onion-shaped with a structure of 50-100 cells?

Back 30

taste bud

Front 31

how often are the neuroepithelial sensory cells replaced?

Back 31

every 10 days

Front 32

What is found at the surface of the taste buds?

Back 32

Microvilli

Front 33

The base of taste budssynapse with _______ ________ neurons of the ___,___,___nerves are found.

Back 33

afferent sensory, VII (facial), IX (glossopharyngeal), X (vagus

Front 34

What 3 cells are found within a taste bud?

Back 34

Supporting cell and Basal Cell, and neuroepithelial (sensory cells)

Front 35

what cell within the taste bud looks similar to neuroepithelial cells but do not synapse with the neurons and turn over every 10 days?

Back 35

Supporting cells

Front 36

______ is a small stem cell at the base of a taste bud.

Back 36

Basal Cells

Front 37

What percentage of dentin is calcified material?

Back 37

70%

Front 38

What type of collage is richly found in predentin?

Back 38

Collage I

Front 39

What structure is the tooth mainly composed of?

Back 39

dentin

Front 40

What cells produce dentin?

Back 40

odontoblasts

Front 41

What is the origin of odontoblasts?

Back 41

Mesenchymal - Neural Crest Cells in the dental papillae during embryological development

Front 42

What are apical extension through the dentin found inside the dentinal tubules?

Back 42

odontoblast processes (tomes fibers)

Front 43

What is the acellular material found within teeth?

Back 43

enamel

Front 44

What is derived from ameloblasts?

Back 44

enamel

Front 45

Where do ameloblasts originate?

Back 45

from ectoderm

Front 46

Once enamel is formed, can it be replaced?

Back 46

NO

Front 47

What is enamel composed of?

Back 47

rods/prisms that span the ENTIRE thickness of the enamel layer, and interrod enamel that binds the enamel rods together

Front 48

What is the pulp comprised of?

Back 48

Loose CT containing odontoblasts, fibroblasts, and collagen fibers

Front 49

What structure in the tooth is highly vascular and has a nerve supply?

Back 49

pulp

Front 50

Where doe the nerve and blood supply exit/enter the tooth?

Back 50

apical foramen

Front 51

What is supporting the teeth and maintaining structures in the maxilla and mandible?

Back 51

Periodontium

Front 52

What covers root dentin?

Back 52

Cementum

Front 53

What cell creates cementum and what is it's embryonic origin?

Back 53

Cementoblasts, mesenchymal origin

Front 54

What is the periodontal ligament derived from?

Back 54

mesenchyme surrounding the cementum

Front 55

T/F the fibers from the periodontal ligament penetrate into the cementum

Back 55

True

Front 56

T/F the fibers from the periodontal ligament have a high turn-over rate

Back 56

True

Front 57

What is the purpose of the periodontal ligament?

Back 57

bind the root to the socket and absorb the pressure (evenly distribute the pressure)

Front 58

what structures are responsible for supporting teeth and maintaining structure in the bone?

Back 58

cementum and periodontal ligament, alveolar bone, and gingiva

Front 59

what is in direct contact with the periodontal ligament?

Back 59

alveolar bone

Front 60

what is the specialized oral mucosa around the neck of the tooth?

Back 60

gingiva (masticatory mucosa)

Front 61

T/F the gingiva is firmly attached to the teeth and alveolar bone

Back 61

True

Front 62

what is the specialized part of the gingiva bound to the tooth enamel?

Back 62

junctional epithelium

Front 63

What binds the gingiva to the tooth enamel?

Back 63

hemidesmosomes

Front 64

what is the small deepening up to 3mm surrounding the cervix of the crown?

Back 64

gingival sulcus (not bound)

Front 65

what is the epithelial attachment comprised of?

Back 65

hemidesmosomes and basal lamina

Front 66

hemidesmsome and basal lamina bind the gingiva to the enamel is called

Back 66

epithelial attachment