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GI/Nutrition > 02b: Oral Cavity > Flashcards

02b: Oral Cavity Flashcards

1
Q

(X) are (major/minor), (serous/mucous/seromucous) glands that secrete directly into moat of (Y) papillae.

A

X = Von Ebner’s glands
Minor, serous;
Y = circumvallate

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2
Q

T/F: There are no purely mucous minor glands in oral cavity.

A

True

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3
Q

Mucous gland cells secrete (X), which is hydro(phobic/philic) and becomes (Y) when (hydrated/dehydrated).

A

X = mucinogen;
Hydrophilic
Y = mucin
Hydrated

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4
Q

Serous gland cells produce (fatty/watery) secretion that’s mostly (X).

A

Water;

X = enzymes/proenzymes

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5
Q

(Serous/mucous) cells secrete granules in merocrine manner.

A

Serous

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6
Q

Basic functional unit of gland is known as (X). What’s (X) comprised of?

A

X = salivon

  1. Serous/mucous acini
  2. Intercalated duct
  3. Striated duct
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7
Q

List the three major, paired salivary glands. Star the mainly/purely serous one(s) and double-star the mainly/purely mucous one(s).

A
  1. Parotid*
  2. Submandibular
  3. Sublingual**
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8
Q

At about day 26 of development, (X) breaks down, causing (Y) structures and tissue types to fuse.

A 
X = oropharyngeal membrane
Y = stomatodeum (ectoderm) and foregut (endoderm)
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9
Q

List oral cavity structures that contain ectoderm-derived epithelium.

A
  1. Palate
  2. Gingiva
  3. Cheeks
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10
Q

List oral cavity structures that contain endoderm-derived epithelium.

A
  1. Tongue, lingual papillae, taste buds

2. Pharynx/epiglottis

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11
Q

The two medial nasal prominences merge (superficially/deep) to form (X). List the three components of (X).

A

Both superficial and deep;
X = intermaxillary segment

  1. Philtrum (labial portion)
  2. Upper jaw (4 incisors)
  3. Primary palate
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12
Q

What does the incisive fossa mark?

A

Midline point of fusion of lateral palatine shelves and primary palate

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13
Q

(X) processes must take place before lateral palatine shelves can fuse together and with (Y) structures.

A 
X = growth, proliferation, elevation
Y = primary palate and nasal septum
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14
Q

T/F: By 10 weeks, the formation of lip/palate is essentially complete.

A

True

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15
Q

(X) are the main tissue layers of oral mucosa. List the three main types of mucosa

A

X = epithelium and CT

  1. Masticatory mucosa
  2. Lining mucosa
  3. Specialized mucosa
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16
Q

T/F: There’s no muscularis mucosae layer in oral cavity.

A

True

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17
Q

(X) layer is not found in all types of oral mucosa. Give specific examples.

A

X = submucosa

Masticatory mucosa (gingiva and hard palate)

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18
Q

In (X) oral mucosa, the absence of submucosa layer results in tight binding of which two layers?

A

X = masticatory

Lamina propria to bone

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19
Q

Masticatory mucosa has (X) epithelium to allow for which specific function?

A

X = stratified squamous (keratinized or parakeratinized)

Withstands friction during chewing

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20
Q

Injection is difficult and infection spreads slowly in (X) type of oral mucosa. The opposite is true in (Y) type of oral mucosa.

A 
X = masticatory
Y = lining
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21
Q

Lining mucosa has (X) epithelium and (Y) tissue responsible for extensibility of the mucosa.

A 
X =  stratified squamous non-keratinized
Y = elastic fiber CT
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22
Q

In which location(s) in oral cavity would you find specialized mucosa?

A

Dorsal surface of tongue (with papillae and taste buds)

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23
Q

The (X) layer of (Y) mucosa in (Z) location of oral cavity has extensive capillary supply/loops. This allows absorption of certain drugs.

A 
X = lamina propria
Y = lining mucosa
Z = floor (sublingual)
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24
Q

In the transition between (X) mucosa and gingiva, which tissue layer will show the most prominent difference in concentration of (Y)?

A

X = masticatory;
Lamina propria
Y = elastic fibers (not present in gingiva)

25
Q

Gingiva is composed of two portions: (X), facing oral cavity and (Y).

A 
X = gingival mucosa
Y = junctional (attachment) epithelium
26
Q

(X) part of the gingiva adheres firmly to (Y) part of tooth via (Z).

A 
X = junctional (attachment) epithelium
Y = cementum/enamel
Z = hemidesmosomes
27
Q

(X) tissue of oral cavity is unique in that it has two basal laminas. What does each attach to?

A

X = gingiva’s junctional epithelium

  1. IBL (to calcified tissue/enamel)
  2. EBL (to CT, like typical basal cells)
28
Q

It’s the junction between (X) and (Y) that’s permeable and, upon passing of antigens, can initiate inflammation, aka (Z).

A 
X = junctional epithelium of gingiva
Y = tooth
Z = gingivitis
29
Q

Salivary gland ducts grow by branching morphogenesis. Specifically, proliferation of (X) tissue grows into (Y) tissue.

A 
X = surface ectoderm (oral epithelial cells)
Y = underlying ectomesenchyme
30
Q

Proliferation/branching of salivary gland ducts is a result of (X) signaling (Y) proliferation.

A 
X = neural crest cells
Y = oral epithelial cell
31
Q

Branching of salivary ducts: upon formation of lumen, the (X) tissue consists of two layers. List them and their eventual differentiated structures.

A

X = epithelium

  1. Inner layer (secretory cells)
  2. Outer layer (myoepithelial contractile cells)
32
Q

T/F: Oral cavity epithelium forms the first barrier against infection.

A

False - saliva does

33
Q

T/F: Saliva aids in speech.

A

True

34
Q

T/F: Although shaped differently, all teeth are histologically similar.

A

True

35
Q

We normally have (X) number of permanent teeth and (Y) deciduous teeth.

A 
X = 32
Y = 20
36
Q

List the three specialized hard tissues of the tooth. Star the type(s) that is/are avascular.

A
  1. Enamel*
  2. Dentin*
  3. Cementum*
37
Q

T/F: Dentin, cementum, and enamel are all embryologically derived from ectomesenchyme.

A

False - enamel from surface ectoderm

38
Q

List the tooth structures that arise from ectomesenchyme.

A
  1. Dentin
  2. Cementum
  3. Periodontal ligament
  4. Alveolar bone
39
Q

List the cells that make dentin, cementum, and enamel.

A

D: odontoblast
C: cementocyte
E: ameloblast

40
Q

The (X) cell that makes (dentin/cementum/enamel) degenerates after its product is fully formed.

A

X = ameloblast

Enamel

41
Q

T/F: Enamel is acellular, avascular, nonviable, and insensitive.

A

True

42
Q

T/F: Structure of enamel is incredibly strong due to organization into simple rods.

A

False - strong due to both rod and inter-rod structure

43
Q

T/F: Dentin forms bulk of tooth

A

True

44
Q

(X) is the organic component of dentin. (Y)% of dentin is inorganic material.

A 
X = collagen type I
Y = 70
45
Q

Dentin is closely packed into (X) that traverse its entire thickness. Contained within (X) are cytoplasmic extensions of (Y).

A 
X = tubules
Y = odontoblasts
46
Q

List the contents of the pulp cavity.

A
  1. Vessels/nerves

2. Odontoblasts

47
Q

Cementum is found in nearly the same plane as (dentin/enamel) and is firmly locked to (X).

A

Enamel (superficial to dentin);

X = dentin

48
Q

(X) relies on vascularity of periodontal ligament for its repair.

A

X = cementum

49
Q

Periodontal ligament is located between (X) and (Y). Its principal tissue type is (Z).

A 
X = alveolar bone and cementum
Z = collagen type I fibers
50
Q

List the three main functions of periodontal ligament.

A
  1. Support/fixation of tooth
  2. Proprioception and pain sensation
  3. Rich blood supply (cementum relies on this for repair)
51
Q

(X) cell layer lines the pulp cavity.

A

X = odontoblast (cell bodies)

52
Q

The narrow lumens of the elongated dentinal tubules are occupied by (X) cell processes.

A

X = odontoblast

53
Q

T/F: the entire outside surface of dentin is covered by mineralized tissue.

A

True (enamel covers crown, cementum covers root)

54
Q

What’s the cervical margin of the tooth?

A

Where cementum and enamel meet

55
Q

Despite the bone-like character of (dentin/cementum), it has no (X).

A

Cementum;

X = blood vessels

56
Q

T/F: Cementum has empty lacuna.

A

True - cementocyte leaves lacuna empty when it dies

57
Q

Sharpey’s fibers, composed of (X) bundles, originate/extend from the (Y) into:

A 
X = collagenous fiber
Y = periodontal ligament

Cementum (and into dentin) on one side; alveolar bone on the other

58
Q

Histologically: what are the three portions of the lip?

A
  1. Cutaneous
  2. Vermilion border
  3. Oral mucosa
59
Q

Lip: transitional, dry red portion is called (X) and recognized by:

A

X = vermilion border

Flaky, thinned, keratinized epithelium

GI/Nutrition (17 decks)

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