Oral mucosa Flashcards
1
Q
the oral mucosa consists of what 2 basic tissues?
A
epithelial layer
connective tissue layer
2
Q
what are the 3 functions of oral mucosa?
A
protection
sensation
secretion
3
Q
A
mucogingival junction
4
Q
A
free gingival groove
5
Q
A
alveolar mucosa
6
Q
A
attached gingiva
7
Q
A
free gingiva
8
Q
what type of mucosa is red?
A
masticatory mucosa
9
Q
what type of mucosa is green?
A
lining mucosa
10
Q
what type of mucosa if blue?
A
specialised mucosa
11
Q
is the lining mucosa keratinised epithelium?
A
no the epithelium is non-keratinised
12
Q
what type of mucosa is this?
A
lining mucosa
13
Q
A
epithelium
14
Q
A
lamina propria
superficial layer of connective tissue
15
Q
A
submucosa
deeper layer of connective tissue
16
Q
A
bone or muscle
17
Q
what is the location of the lining mucosa?
A
In parts of the mouth that are not subjected to high stress
18
Q
what are these undulating extensions of epithelium called?
A
rete pegs
19
Q
what is this layer of lining mucosa epithelium?
A
superficial layer
20
Q
what is this layer of lining mucosa epithelium?
A
intermediate layer
21
Q
what is this layer of lining mucosa epithelium?
A
prickle cell layer
22
Q
what is this layer of lining mucosa epithelium?
A
basal cell layer
23
Q
all epithelial cells have what?
A
filaments and desmosomes
24
Q
what are desmosomes?
A
attach cells together
25
name this cell
basal cell
26
name this cell
prickle cell
27
what is often visible in basal cells?
mitosis
28
what happens in cells in the intermediate layer of lining mucosa?
Membrane coating granules discharge contents between cells to create a permeability barrier
29
what is the clinical importance of the intermediate layer permeability barrier is not wholly effective of lining mucosa?
so drugs can be absorbed sublingually e.g. GTN for Angina
30
as you get to the more superficial layers of epithelium the cells appear?
more squished
31
is masticatory mucosa keratinised?
yes
32
why is masticatory mucosa less flexible?
no submucosa
33
what type of mucosa is this?
masticatory mucosa
34
name this layer of masticatory mucosa
keratinised layer
35
name this layer of masticatory mucosa
epithelium
36
name this layer of masticatory mucosa
lamina propria
37
name this layer of masticatory mucosa
name this layer of masticatory mucosa
38
name this layer of masticatory mucosa
bone
39
name this part of the epithelium
rete pegs
40
what are the two layers of lamina propria in masticatory mucosa?
papillary layer
reticular layer
41
name this layer of lamina propria of masticatory mucosa
papillary layer
42
name this layer of lamina propria of masticatory mucosa
reticular layer
43
name this layer of epithelium of masticatory mucosa
keratinised layer
44
name this layer of epithelium of masticatory mucosa
granular layer
45
name this layer of epithelium of masticatory mucosa
prickle cell layer
46
name this layer of epithelium of masticatory mucosa
basal cell layer
47
what are the cells like in the keratinised layer of epithelium in masticatory mucosa?
Flattened, dead, no organelles, keratin, dehydrated not flexible
48
what is the structure of a granular layer cell?
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
what is the structure of a prickle cell?
filaments organised into bundles - tonofibrils
50
what are keratinocytes?
building block of epithelium make up 90% of epithelial cells
51
what is another name for non-keratinocytes due to their appearance under microscope?
clear cells
52
what is the structure of non-keratinocytes?
lack tonofilaments and desmosomes
53
name this 4 types of non-keratinocytes
merkel cells
melanocytes
langerhan's cells
inflammatory cells
54
what is the location of merkel cells?
basal layer of epithelium
55
what is the function of merkel cells?
touch receptors
56
name this non-keratinocyte
merkel cell
57
what is the location of melanocytes?
basal layer of epithelium
58
what is the function of melanocytes?
Contain melanosomes that produce melanin their activity determines the colour of the skin
59
name this non-keratinocyte
melanocyte
60
where are Langerhan's cells located
suprabasal layers of epithelium -> more superficial layers
61
name a structural thing about Langerhan's cells
they have dendrites
62
what is the function of Langerhan's cells?
Process antigenic material
63
where are inflammatory cells located in the epithelium?
Suprabasal layers -> more superficial layers of epithelium
64
what are the most common inflammatory cell that transiently migrates into the epithelium?
lymphocytes
65
why are non-keratinocytes called clear cells?
During preparation cells shrink, as non-keratinocytes aren't attached as no desmosomes they shrink
66
name this layer of specialised mucosa
epithelium with papillae
67
name this layer of specialised mucosa
lamina propria with minor salivary glands
68
name this layer of specialised mucosa
muscle
69
name these papillae
circumvallate
70
name these papillae
foliate
71
name these papillae
fungiform
72
name these papillae
filiform
73
name these papillae
filiform
74
name these papillae
fungiform
75
name these papillae
foliate
76
name these papillae
circumvallate
77
which papillae have minor salivary glands?
foliate and circumvallate
78
what are the minor salivary glands in papillae called?
serous glands of von ebner
79
where are filiform papillae located?
anterior part of tongue
80
what is the structure of filiform papillae?
○ Keratinised epithelial cover -> tough and abrasive
Non-keratinised epithelium in between -> flexibility
81
what is the innervation to filiform papillae?
CNV3 lingual nerve
82
where are fungiform papillae located?
anterior tongue
83
what is the innervation to the fungiform papillae?
CNVII - chorda tympani - lingual
84
where are the taste buds located on fungiform papillae?
on the oral surface
surface that faces the mouth
85
how many taste buds per fungiform papillae?
anterior 1-18
mid tongue 1-9
86
where are foliate papillae located?
posterior tongue laterally
87
what is the innervation to the foliate papillae?
CNVII - chorda tympani
(posterior CNIX)
88
where are the taste buds located in foliate papillae?
In the clefts between the ridges
89
how many taste buds per foliate papillae?
120
90
where are the circumvallate papillae located?
anterior to terminal sulcus
91
what is the innervation to circumvallate papillae?
CNIX
92
where are the taste buds located on circumvallate papillae?
On the walls of the cleft
93
how many taste buds per circumvallate papillae?
252
94
how many circumvallate papillae per tongue?
2-13
95
what are the 3 functions of serous glands of von Ebner?
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
learn this structure of a taste bud
97
what is the function of type 1 taste buds?
dark cells
support cells
98
what is the function of type II taste buds?
light cells
Immature type III cells, support cells or receptors -> unknown
99
what is the function of type III taste buds?
Receptors
Synaptically coupled to gustatory nerves
100
what is the function of type IV taste buds?
Precursor of type I,II and III
