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Oral Histology > Oral Mucosa > Flashcards

Flashcards in Oral Mucosa Deck (71)
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1

What is the mouth, nasal passages, and GI tract lined by?

Mucous membrane

2

What 2 tissues make up a mucous membrane?

Epithelium
Underlying Connective tissue

3

What makes up the underlying connective tissue?

Lamina propria
Sometimes the submucosa

4

What layer are blood vessels located in the mouth?

Lamina propria or Submucosa

5

What layer are minor salivary glands located?

Submucosa

6

Where are ducts from minor and major salivary glands located?

Travel through the connective tissue to communicate with the mucosal surface

7

What are the functions of oral mucosa?

Protection
Aid in digestion
Sensory innervation

8

What are the types of protection the Oral mucosa provieds?

Barrier
Anti-microbial

9

Barrier defense of oral mucosa

Epithelium provides a physical barrier for things to not come into contact with deeper underlying tissues

10

Anti-microbial defense of the oral mucosa

Immune cells are found mostly in the lamina propria, but also found in the epithelium

11

B-defensins

Anti-microb secreted by teh superficial epithelium of the oral cavity
Large amount is secreted when there is an infection
Cysteine-rich, cationic molecule that binds to negative charges on bacterial membranes

12

How does the oral mucosa aid in ingestion?

Provides flexibility and a moist surface, making chewing and swallowing easier

13

Which is capable of more type sensation, oral mucosa, PDL, or pulp?

Oral mucosa

14

What types of fibers innervate pulp/dentin and what type of sensation do they provide?

C, A-delta, A-beta = mostly pain

15

What types of fibers innervate the PDL, and what type of sensation do they provide?

C and A-delta = pain
A-beta = proprioceptive

16

What types of fibers innervate the oral mucosa and what type of sensation do they provide?

A-beta = touch
A-delta and C = pain
A-delta and C = thermal
A-delta = taste

17

What type of cells are found in oral mucosa epithelium

Stratified Squamous epithelium

18

What occurs in the deep layers of the oral mucosa epithelium?

Location of cell division

19

What occurs at the superficial layers of oral epithelium?

This is where cells migrate, mature, become part of the surface, and then slough off

20

What is the turnover time for gingiva epithelium?

41-57 days

21

What is the turnover time for cheek epithelium?

25 days

22

What is the turnover time for taste buds?

10 days

23

What is the turnover time for junctional epithelium?

5-10 days

24

What is the cost/benefit of having fast turnover in epithelium

They can heal faster, but it also makes the tissues more vulnerable to conditions that affect cell division (chemotherapy, radiation, ulceration)

25

What are the most numerous cells of the oral mucosa?

Keratinocytes (aka epithelial cells)

26

What are the non-keratinocytes found in the oral mucosa?

Merkel cells
Melanocytes
Langerhans (dendritic cells)

27

Merkel cells

Sensory cells in the basal layer of the epithelium

28

Melanocytes

Pigment cells in the basal layer of the epithelium

29

Langerhans (dendritic) cells

Immune cells in the supra-basal layers

30

T/F - Different oral regions are lined by keratinized v non-keratinized epithelium

True