Chapter 9-1 Oral Mucosa

Question 1

What is the oral mucosa composed of

Answer 1

stratified squamous epithelium overlying connective tissue proper with a deeper submucosa

Question 2

Connective tissue proper aka…

Answer 2

lamina propria

Question 3

What are the two main tissue of oral mucosa

Answer 3

stratified squamous epithelium and lamina propria

Question 4

What is the connective tissue papillae

Answer 4

interface between epithelium and connective tissue; upward projections

Question 5

Where does the basement membrane of oral mucosa lie

Answer 5

between epithelium and connective tissue

Question 6

In regions of cheeks, lips, and hard palate what separates oral mucosa from underlying bone/muscle

Answer 6

submucosal layer of loose fatty or glandular connective tissue

Question 7

Describe oral mucosa in gingiva and parts of hard palate

Answer 7

oral mucosa is attached directly to periosteum of underlying bone

Question 8

What is the mucoperiosteum

Answer 8

provides firm, inelastic attachment; oral mucosa attached to periosteum

Question 9

What are the three types of oral mucosa

Answer 9

Lining mucosa
Masticatory mucosa
Specialized mucosa

Question 10

Where is the lining mucosa found

Answer 10

Buccal mucosa, labial mucosa, alveolar mucosa
ventral surface of tongue
floor of mouth
soft palate

Question 11

Where is masticatory mucosa found

Answer 11

attached gingiva
hard palate
dorsal surface of tongue

Question 12

Where is specialized mucosa found

Answer 12

dorsal and lateral surface of tongue

Question 13

What are the histological features of lining mucosa

Answer 13

Nonkeratinized epithelium with smooth interface
Few rete ridges and connective tissue papillae
Elastic fibers in lamina propria and submucosa

Question 14

What are the histological features of masticatroy mucosa

Answer 14

Keratinized epithelium and interdigitated interface
Many rete ridges and connective tissue papillae
Thin layer of submucosa or none

Question 15

What are the histological features of specialized mucosa

Answer 15

discrete structures of epithelium and lamina propria
Many with taste buds

Question 16

Oral mucosa is ________ in various regions by ducts of salivary gland

Answer 16

Perforated

Question 17

Oral mucosa have areas with _______ or _________ epithelium

Answer 17

thinner / thicker

Question 18

What are the three types of stratified squamous epithelium (and associated oral mucosa of each)

Answer 18

nonkeratinized - lining of mucosa
Orthokeratinized - masticatory & specialized
Parakeratinized - masticatory & specialized

Question 19

How are the three types of stratified squamous epithelium different from each other

Answer 19

differ in surface layers of epithelium

Question 20

What is keratin

Answer 20

tough, fibrous, opaque, waterproof protein

Question 21

How is keratin produced

Answer 21

produced during maturation of keratinocyte epithelial cells

Question 22

What are the four types of mucosa in the lining mucosa

Answer 22

Buccal mucosa
Labial mucosa
Alveolar mucosa
Mucosa lining the ventral surface of tongue, floor of mouth, and soft palate

Question 23

What fibers provide tissue with movable base

Answer 23

Elastic fibers

Question 24

What type of mucosa lines the inner lips and cheeks

Answer 24

Labial and buccal mucosa

Question 25

Three lining mucosa layers

Answer 25

Basal layer Intermediate layer Superficial layer

Question 26

Hyperkeratinization

Answer 26

nonkeratinized epithelium transforming into a keratinizing type in response to frictional/chemical response

Question 27

Mucosa is classified as what type of mucosa

Answer 27

Lining mucosa

Question 28

Describe the texture of masticatory mucosa

Answer 28

rubber surface texture and resilient

Question 29

Characteristics of masticatory mucosa (3)

Answer 29

Keratinized stratified squamous epithelium Highly interdigitated Deeper submucosa is extremely thing layer or absent

Question 30

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