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MedCell Exam 5 > Oral Cavity > Flashcards

Oral Cavity Flashcards

1
Q

vestibule:

A

inside lip to anterior surface of lip

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2
Q

oral cavity

A

posterior to teeth

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3
Q

Oral mucosa

A

3 types of WET stratified squamous epithelia

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4
Q

3 types of WET stratified squamous epithelia of oral mucosa

A

1) lining
2) Masticatory
3) Specialized

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5
Q

What does lining Stratified squamous oral mucosa cover?

Keritinized?

A

cover most of oral cavity

nonkeratinized

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6
Q

What does Masticatory squamous oral mucosa cover?

Keritinized?

A

covers gingival surface and hard palate

keritinized

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7
Q

What does specialized Stratified squamous oral mucosa cover?

A

Taste, only on tounge

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8
Q

What are the three layers of lips?

A

skin
lining mucosa
vermillion zone

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9
Q

What type of epithelia does the skin of lips have? and what organelles do they have?

A

Keritinized SSE

Hair follicles, sweat, sebaceous glands

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10
Q

What type of epithelia does the lining mucosa of lips have? and what organelles do they have?

A

non keratinized SSE
subepithethial CT dense irregular
Salivary glands

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11
Q

What type of epithelia does the vermillion zone of lips have? and what organelles do they have?
Sweat/sebasous glands?

A

keratinized SSE
CT with papillae
small blood vessels close to the surface
No sweat/ sebasous glands

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12
Q

Where are the salivary glands located

A

in the lining mucosa

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13
Q

What are the 4 types of specialized mucosa?

A

1) Filiform
2) Fungiform
3) foliate
4) circumvallate

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14
Q

What are specialized mucosa cells made up of?

What are specialized mucosa cells covered with?

A

papillae

Membrane w/nerve endings

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15
Q

Which type of specialized mucosa cells lack tastebuds?

A

Filiform

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16
Q

Which type of specialized mucosa cells are surrounded by filiform cells?

A

Fungiform

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17
Q

Which type of specialized mucosa cells are only on the dorsal surface of the tounge?

A

Fungiform

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18
Q

Which type of specialized mucosa cells is atrophied in humans?

A

Foliate

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19
Q

Which type of specialized mucosa cells are large, dome shaped and in a V shape?

A

Circumvallate

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20
Q

What are taste buds made up of? What do they open onto? and allow access of?

A

Taste pore- open onto epithelial surface for access to tastants

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21
Q

What are the 2 types of the 4 cell types of taste buds?

A

3) neuroepithelia

1) basal

22
Q

What are the 3 types of neuroepithelia cells? What do they have? What do they do?

A

Light dark intermediate
Apical surface have microvilli
synapse with neurons

23
Q

What are basal cells (taste buds)? and what do they do?

A

stem cells

develop into light/dark/intermediate neuroepithelia cells

24
Q

How many deciduous (primary teeth) and permanent teeth do we have?

A

20

32

25
Q

Molar teeth erupt how many times?

A

1 time

26
Q

What does a tooth emerge from in dental eruption?

A

a dental follicle

27
Q

What is the roll of pressure in dental eruption?

A

causes reabsorption of alveolar process and primary root

28
Q

Which erupts first maxillary or mandibular incisors?

A

Mandibular first then maxillary

29
Q

What is the hardest and most mineralized substance in the body?

A

Enamel

30
Q

What is the function of enamel?

A

covers anatomical crown

31
Q

How many times is enamel formed?

A

1 time, does not redevelop

32
Q

Dentin is where in relationship to enamel?
Dentin is harder or softer than enamel?
How many times is dentin formed?

A

deep
softer
throught lifetime

33
Q

What is the function of cementum?

A

Covers root

34
Q

What attaches cementum to alveolar bone?

A

periodontal ligament, keeps teeth in position

35
Q

Enamel is formed how?

A

ameloblasts secrete columns of enamel prisms

36
Q

What damages enamel?

A

Acid- excessive vomiting

37
Q

Which layer of the tooth is avascular?

A

cementum

38
Q

What are the 3 layers of the tooth?

A

enamel, dentin, cementum

39
Q

How is cementum made?

A

Cementoblasts secrete cementoid which are incorporated into lacunae as cementocytes

40
Q

What layer of the tooth contains the bulk of dental mineralized tissues?

A

Dentin

41
Q

How is dentin made?

How many times is dentin made?

A

secreted by odontoblasts from dental tubules

formed/repaired throught life

42
Q

What is the risk of exposed dental tubules? and what does this lead to?

A

dentin hypersensitivity which leads to gingival recession

43
Q

Where is dentin deposited?

A

into the pulp cavity

44
Q

What are incremental growth (Von Ebners) lines?

A

lines that cross dent in tubules at right angles

45
Q

What are lines of owen?

A

indicate periods of stress

46
Q

When do tooth buds form?

A

in uteruo

47
Q

In what direction does tooth development occur?

A

from crown to root

48
Q

What activates ameloblasts on top of dentin?

A

Odontoblast activity

49
Q

What are the 2 types of ameloblasts

A

1) secretory ameloblasts- secrete partially mineralized enamel
2) Maturation stage ameloblasts- remove organic material and insert hydroxyapatite crystals

50
Q

When does ameloblasts cease function?

A

when tooth eruption begins

MedCell Exam 5 (9 decks)

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