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3 Oral Biology > Oral mucosa > Flashcards

Oral mucosa Flashcards

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1
Q

the oral mucosa consists of what 2 basic tissues?

A

epithelial layer
connective tissue layer

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2
Q

what are the 3 functions of oral mucosa?

A

protection
sensation
secretion

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3
Q
A

mucogingival junction

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4
Q
A

free gingival groove

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5
Q
A

alveolar mucosa

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6
Q
A

attached gingiva

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7
Q
A

free gingiva

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8
Q

what type of mucosa is red?

A

masticatory mucosa

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9
Q

what type of mucosa is green?

A

lining mucosa

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10
Q

what type of mucosa if blue?

A

specialised mucosa

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11
Q

is the lining mucosa keratinised epithelium?

A

no the epithelium is non-keratinised

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12
Q

what type of mucosa is this?

A

lining mucosa

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13
Q
A

epithelium

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14
Q
A

lamina propria
superficial layer of connective tissue

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15
Q
A

submucosa
deeper layer of connective tissue

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16
Q
A

bone or muscle

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17
Q

what is the location of the lining mucosa?

A

In parts of the mouth that are not subjected to high stress

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18
Q

what are these undulating extensions of epithelium called?

A

rete pegs

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19
Q

what is this layer of lining mucosa epithelium?

A

superficial layer

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20
Q

what is this layer of lining mucosa epithelium?

A

intermediate layer

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21
Q

what is this layer of lining mucosa epithelium?

A

prickle cell layer

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22
Q

what is this layer of lining mucosa epithelium?

A

basal cell layer

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23
Q

all epithelial cells have what?

A

filaments and desmosomes

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24
Q

what are desmosomes?

A

attach cells together

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25
Q

name this cell

A

basal cell

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26
Q

name this cell

A

prickle cell

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27
Q

what is often visible in basal cells?

A

mitosis

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28
Q

what happens in cells in the intermediate layer of lining mucosa?

A

Membrane coating granules discharge contents between cells to create a permeability barrier

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29
Q

what is the clinical importance of the intermediate layer permeability barrier is not wholly effective of lining mucosa?

A

so drugs can be absorbed sublingually e.g. GTN for Angina

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30
Q

as you get to the more superficial layers of epithelium the cells appear?

A

more squished

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31
Q

is masticatory mucosa keratinised?

A

yes

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32
Q

why is masticatory mucosa less flexible?

A

no submucosa

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33
Q

what type of mucosa is this?

A

masticatory mucosa

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34
Q

name this layer of masticatory mucosa

A

keratinised layer

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35
Q

name this layer of masticatory mucosa

A

epithelium

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36
Q

name this layer of masticatory mucosa

A

lamina propria

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37
Q

name this layer of masticatory mucosa

A

name this layer of masticatory mucosa

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38
Q

name this layer of masticatory mucosa

A

bone

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39
Q

name this part of the epithelium

A

rete pegs

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40
Q

what are the two layers of lamina propria in masticatory mucosa?

A

papillary layer
reticular layer

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41
Q

name this layer of lamina propria of masticatory mucosa

A

papillary layer

42
Q

name this layer of lamina propria of masticatory mucosa

A

reticular layer

43
Q

name this layer of epithelium of masticatory mucosa

A

keratinised layer

44
Q

name this layer of epithelium of masticatory mucosa

A

granular layer

45
Q

name this layer of epithelium of masticatory mucosa

A

prickle cell layer

46
Q

name this layer of epithelium of masticatory mucosa

A

basal cell layer

47
Q

what are the cells like in the keratinised layer of epithelium in masticatory mucosa?

A

Flattened, dead, no organelles, keratin, dehydrated not flexible

48
Q

what is the structure of a granular layer cell?

A

Contain keratohyaline granules that produce filaggrin which forms the matrix for filaments in keratinised layer.

membrane coating granules produce effective permeability barriers so cells beyond layer are dead

49
Q

what is the structure of a prickle cell?

A

filaments organised into bundles - tonofibrils

50
Q

what are keratinocytes?

A

building block of epithelium make up 90% of epithelial cells

51
Q

what is another name for non-keratinocytes due to their appearance under microscope?

A

clear cells

52
Q

what is the structure of non-keratinocytes?

A

lack tonofilaments and desmosomes

53
Q

name this 4 types of non-keratinocytes

A

merkel cells
melanocytes
langerhan’s cells
inflammatory cells

54
Q

what is the location of merkel cells?

A

basal layer of epithelium

55
Q

what is the function of merkel cells?

A

touch receptors

56
Q

name this non-keratinocyte

A

merkel cell

57
Q

what is the location of melanocytes?

A

basal layer of epithelium

58
Q

what is the function of melanocytes?

A

Contain melanosomes that produce melanin their activity determines the colour of the skin

59
Q

name this non-keratinocyte

A

melanocyte

60
Q

where are Langerhan’s cells located

A

suprabasal layers of epithelium -> more superficial layers

61
Q

name a structural thing about Langerhan’s cells

A

they have dendrites

62
Q

what is the function of Langerhan’s cells?

A

Process antigenic material

63
Q

where are inflammatory cells located in the epithelium?

A

Suprabasal layers -> more superficial layers of epithelium

64
Q

what are the most common inflammatory cell that transiently migrates into the epithelium?

A

lymphocytes

65
Q

why are non-keratinocytes called clear cells?

A

During preparation cells shrink, as non-keratinocytes aren’t attached as no desmosomes they shrink

66
Q

name this layer of specialised mucosa

A

epithelium with papillae

67
Q

name this layer of specialised mucosa

A

lamina propria with minor salivary glands

68
Q

name this layer of specialised mucosa

A

muscle

69
Q

name these papillae

A

circumvallate

70
Q

name these papillae

A

foliate

71
Q

name these papillae

A

fungiform

72
Q

name these papillae

A

filiform

73
Q

name these papillae

A

filiform

74
Q

name these papillae

A

fungiform

75
Q

name these papillae

A

foliate

76
Q

name these papillae

A

circumvallate

77
Q

which papillae have minor salivary glands?

A

foliate and circumvallate

78
Q

what are the minor salivary glands in papillae called?

A

serous glands of von ebner

79
Q

where are filiform papillae located?

A

anterior part of tongue

80
Q

what is the structure of filiform papillae?

A

○ Keratinised epithelial cover -> tough and abrasive
Non-keratinised epithelium in between -> flexibility

81
Q

what is the innervation to filiform papillae?

A

CNV3 lingual nerve

82
Q

where are fungiform papillae located?

A

anterior tongue

83
Q

what is the innervation to the fungiform papillae?

A

CNVII - chorda tympani - lingual

84
Q

where are the taste buds located on fungiform papillae?

A

on the oral surface
surface that faces the mouth

85
Q

how many taste buds per fungiform papillae?

A

anterior 1-18
mid tongue 1-9

86
Q

where are foliate papillae located?

A

posterior tongue laterally

87
Q

what is the innervation to the foliate papillae?

A

CNVII - chorda tympani

(posterior CNIX)

88
Q

where are the taste buds located in foliate papillae?

A

In the clefts between the ridges

89
Q

how many taste buds per foliate papillae?

A

120

90
Q

where are the circumvallate papillae located?

A

anterior to terminal sulcus

91
Q

what is the innervation to circumvallate papillae?

A

CNIX

92
Q

where are the taste buds located on circumvallate papillae?

A

On the walls of the cleft

93
Q

how many taste buds per circumvallate papillae?

A

252

94
Q

how many circumvallate papillae per tongue?

A

2-13

95
Q

what are the 3 functions of serous glands of von Ebner?

A

Create a diffusion pathway

Remove stimulus, flush away the chemicals dissolved in the saliva

Secrete proteins involved in binding the chemicals to the taste cells

96
Q

learn this structure of a taste bud

A
97
Q

what is the function of type 1 taste buds?

A

dark cells
support cells

98
Q

what is the function of type II taste buds?

A

light cells
Immature type III cells, support cells or receptors -> unknown

99
Q

what is the function of type III taste buds?

A

Receptors

Synaptically coupled to gustatory nerves

100
Q

what is the function of type IV taste buds?

A

Precursor of type I,II and III

3 Oral Biology (14 decks)

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