Oucod Oral Histology Lecture 8 Oral Mucosa

Front 1

Mucosa is comprised of 2 layers, name them.

Back 1

1. epithelium
2. lamina propria (CT)

Front 2

Name the 3 types of mucosa in the oral cavity.

Back 2

1. lining
2. masticatory
3. special

Front 3

Which types of mucosa in the mouth are keratinized?

Back 3

masticatory and special

Front 4

T or F: special mucosa is both keratinized and non-keratinized?

Back 4

True

Front 5

T or F: masticatory mucosa can be para-keratinized or ortho-keratinized?

Back 5

True

Front 6

T or F: basal lamina and basement membrane are synonymous?

Back 6

True

Front 7

______________ cells produce the lamina lucida of the basal lamina.

Back 7

epithelial

Front 8

Major component of lamina lucida.

Back 8

laminin

Front 9

Lamina densa is composed of type __ collagen.

Back 9

IV

Front 10

epithelial cells attach to lamina lucida via __________ and ____________.

Back 10

hemidesmosomes; anchoring filaments

Front 11

lamina propria attaches to lamina densa via _______________.

Back 11

type VII collagen (anchoring fibrils)

Front 12

Type __ collagen anchors lamina propria to lamina densa via type __ collagen fibrils.

Back 12

I; VII

Front 13

Rete pegs are part of the (epithelium/lamina propria)?

Back 13

epithelium

Front 14

Papillary layer is a (LP/epithelial) layer?

Back 14

LP

Front 15

Which layer is deep to the papillary layer?

Back 15

reticular layer

Front 16

T or F: the reticular layer is composed of large, mesh like collagen fibers and connects the LP to tissue beneath?

Back 16

True

Front 17

Rete pegs will be longer in (keratinized/non-keratinized) tissue?

Back 17

keratinized

Front 18

What are a-c?

Back 18

a- epithelium
b- basal lamina
c- lamina propria

Front 19

Capillary network of oral mucosa are found within the (papillae/rete pegs)?

Back 19

papillae

Front 20

Number of capillary loops in oral mucosa is (greater/less) than in the skin?

Back 20

greater

Front 21

In the cheek, each papilla has (one/multiple) capillary loops while the tongue papillae have (one/multiple) loops?

Back 21

one;multiple

Front 22

Blood flow in the oral mucosa is greatest where?

Back 22

the gingiva

Front 23

Blood flow in the oral mucosa is (greater/less) than the skin?

Back 23

greater

Front 24

The pink color of the oral mucosa is due to ______________?

Back 24

increased number of capillaries

Front 25

T or F: In the oral mucosa, there are no arteriovenous shunts, but there are numbers anastomoses between the arterioles and capillaries?

Back 25

True

Front 26

What contributes to quick healing in the oral mucosa?

Back 26

Large available blood flow (lots of capillaries)

Front 27

In this picture, what do the colors represent? (be specific)

Back 27

Yellow - lining mucosa (non-keratinized)
Blue- Masticatory mucosa (keratinized)
Green - Special mucosa (can be keratinized or non-keratinized)

Front 28

Where is special mucosa found?

Back 28

dorsal surface of tongue

Front 29

The ventral surface of the tongue has what type of mucosa?

Back 29

lining

Front 30

Gingiva is comprised of what type of mucosa?

Back 30

masticatory

Front 31

The soft palate is ___________ mucosa, while the hard palate is ___________ mucosa?

Back 31

lining;masticatory

Front 32

name 4 locations of lining mucosa?

Back 32

1. ventral tongue
2. cheeks
3. soft palate
4. lips

Front 33

Lining mucosa will have (many/few) CT papillae?

Back 33

few

Front 34

What holds mucosa to the underlying muscle?

Back 34

submucosa

Front 35

T or F: Lining mucosa has no keratinocytes?

Back 35

False, they get larger as they move towards the surface

Front 36

Lining mucosa has a _______ appearance?

Back 36

frothy

Front 37

Cells in the lining mucosa have _________ filled sacs which push cytoplasmic components to the (center/periphery) of the cell?

Back 37

fluid;periphery

Front 38

Fluid filled cells in the lining mucosa act as __________ to underlying cells?

Back 38

cushion

Front 39

Name the fingerlike projections depicted at 'A'

Back 39

desmosomes

Front 40

Name the type of mucosa.

Back 40

lining (note the white, "frothy" cells at top)

Front 41

Name two places where masticatory mucosa is found?

Back 41

gingiva and hard palate

Front 42

T or F: thickness of masticatory mucosa is indicative of attrition?

Back 42

True

Front 43

______ papillae in masticatory mucosa are tall and thin.

Back 43

CT

Front 44

___________ usually underlies masticatory mucosa.

Back 44

bone

Front 45

Name the two forms of masticatory mucosa.

Back 45

1. orthokeratinized stratified squamous
2. parakeratinized stratified squamous

Front 46

Is orthokeratinized or parakeratinized more common?

Back 46

ortho

Front 47

Where is parakeratinized mucosa found?

Back 47

non-attached free gingiva

Front 48

masticatory mucosa will have (small/large) rete pegs?

Back 48

large

Front 49

What type of mucosa? What are a-f?

Back 49

masticatory

a- cornified layer
b- epithelium
c- lamina propria
d- underlying bone
e- CT papilla
f- rete peg

Front 50

What are a-g? specific type of mucosa?

Back 50

a- cornified layer
b- granular layer
c- epithelium
d- CT papilla
e- rete peg
f- lamina propria
g- bone

orthokeratinized mucosa (has a granular layer, parakeratinized does not)

Front 51

Name the 4 layers of orthokeratinized epithelium?

Back 51

1. stratum corneum
2. stratum granulosum
3. stratum spinosum
4. stratum basale

Front 52

Cells in the stratum corneum are (dead/alive)?

Back 52

dead

Front 53

T or F: Cells in the stratum corneum have a nucleus?

Back 53

False

Front 54

Cells in the stratum corneum are filled with ____________?

Back 54

lipid

Front 55

Thickness of the stratum corneum is dependent on _____________ _______?

Back 55

mechanical stress

Front 56

Stratum corneum is compose of flattened __________?

Back 56

squames

Front 57

Stratum granulosum is __ to __ cells deep.

Back 57

2-4

Front 58

Cells in the stratum granulosum are filled with ___________, which contribues to their dark _______?

Back 58

keratohyalin granules; color

Front 59

name the strata.

Back 59

a- stratum corneum
b- stratum granulosum
c- stratum spinosum
d- stratum basale

Front 60

T or F: Dead cells in parakeratinized mucosa retain their nuclei and do NOT comprise a stratum corneum?

Back 60

True

Front 61

T or F: There is a granular (stratum granulosum) layer in parakeratinized mucosa?

Back 61

False

Front 62

If a nuclei is shrunken and degenerated, it is ___________? This occurs in ____________ mucosa?

Back 62

pyknotic;parakeratinized

Front 63

T or F: there is no submucosa under specialized mucosa

Back 63

True

Front 64

Papillae in specialized mucosa have two possible functions, what are they?

Back 64

mechanical, taste

Front 65

T or F: special mucosa can be covered by keratinized or non-keratinized stratified squamous?

Back 65

True

Front 66

Name the four types of lingual papillae?

Back 66

filiform, fungiform, circumvallate, foliate

Front 67

Where is the sulcus terminalis located?

Back 67

behind the circumvallate papillae

Front 68

name the type of papilla?

Back 68

filiform

Front 69

Which is the most common type of lingual papilla?

Back 69

filiform

Front 70

T or F: filiform papillae are keratinized?

Back 70

True

Front 71

T or F: filiform papillae have many taste buds?

Back 71

False, no taste buds

Front 72

T or F: filiform papillae have a mechanical function and have sensory nerve ending to feel food.

Back 72

True

Front 73

__ __________ do not extend into the filiform papillae.

Back 73

CT papillae

Front 74

Fungiform papillae are what shape?

Back 74

mushroom

Front 75

Fungiform papillae are more numerous in (younger/older) individual?

Back 75

younger

Front 76

T or F: Fungiform papillae have a thick layer of keratinized tissue?

Back 76

Fase, thin

Front 77

Keratinization of fungiform papillae (thin/thicken) with age?

Back 77

thicken

Front 78

Name three things fungiform papillae can detect?

Back 78

1. sweet
2. salty
3. sour

Front 79

Which papillae are the largest?

Back 79

circumvallate

Front 80

Circumvalate papilla are associated with what gland?

Back 80

von Ebner

Front 81

What is the purpose of the von Ebner glands?

Back 81

to flush bitter stimuli from the trough which holds the taste buds

Front 82

Taste buds are composed of three types of cells, what are they?

Back 82

1. taste cells
2. supporting cells
3. basal cells

Front 83

Which cells in the taste bud regenerate the other cells?

Back 83

basal cells

Front 84

Which cells line the taste pore?

Back 84

taste cells

Front 85

What is a taste pore?

Back 85

portion of taste bud which contacts the oral cavity

Front 86

cells in taste pore are protected by a _______________?

Back 86

taste pore substance

Front 87

What is stimulated on the receptor cell in a taste pore?

Back 87

microvilli

Front 88

Nerves contact taste cells at the (basal/apical) surface?

Back 88

basal

Front 89

5 yr survival rate for oral/pharynx cancer?

Back 89

59%

Front 90

Tobacco causes __% of head and neck cancers?

Back 90

85

Front 91

what two substances are the greatest contributors to head and neck cancers?

Back 91

tobacco and alcohol

Front 92

_________ American men and women developed cancer in 2005?

Back 92

39,000

Front 93

What is the #1 site for oral cancer?

Back 93

ventral side of tongue