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Histology 2 > Salivary Glands and Oral Mucosa > Flashcards

Salivary Glands and Oral Mucosa Flashcards

1
Q

What does the oral mucosa consist of?

A

Stratified squamous epithelium
Lamina propria of dense connective tissue
Submucosa of loose connective tissue

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2
Q

Where is the epithelium keratinised in the oral mucosa?

A

Dorsum of tongue, hard palate and oral gingiva

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3
Q

Where are the areas lacking keratin in oral mucosa?

A

Ventral surface of tongue, cheeks, lips, floor of mouth and soft palate

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4
Q

What is the nasal cavity lined with?

A

Respiratory epithelium

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5
Q

What is the dorsal surface of the tongue lined with?

A

Keratinised stratified squamous epithelium

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6
Q

What are the different tongue papillae?

A

Filiform, Fungiform, Foliate and Circumvallate

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7
Q

Describe Filiform Papillae?

A

Conical shape, no taste buds, heavily keratinised

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8
Q

Describe Fungiform Papillae?

A

Blunt, taste buds

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9
Q

Describe Foliate Papillae?

A

Slit-like on margin of tongue, taste buds

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10
Q

Describe Circumvallate Papillae?

A

Large, dome-shaped, 6-12 in two lines, form a ‘v’, point between glossopharyngeal and facial nerve innervation, taste buds found at papillae margin facing the cleft

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11
Q

What are taste buds?

A

Multicellular chemoreceptive units formed form modified epithelial cells which are innervated

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12
Q

What are the three major salivary glands?

A

Parotid, Submandibular and Sublingual glands

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13
Q

Where are the major salivary glands found?

A

Outside the oral cavity

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14
Q

What is the structure of salivary glands?

A

Stroma and parenchyma

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15
Q

What is parenchyma?

A

A compound of tubule-acinar glands

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16
Q

How does merocrine secretion occur?

A

Via exocytosis when the membranes surrounding the secretory vesicles fuse with the cell membrane

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17
Q

The secretory elements of salivary glands are classified as what?

A

Serous or mucous

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18
Q

What do serous cells secrete?

A

A thin watery secretion that contains proteins and ions

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19
Q

What do mucous cells secrete?

A

Mucin, which consists of a protein core that is hightail decorated with sugar residues and results in a viscous sticky secretion

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20
Q

Where do mucous cells tend to be found?

A

In the tubular element of the tubuloacinar glandular structure

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21
Q

What is it called when the serous cells often appear as a crested shaped collection of cells at the end of the secretory unit?

A

Serous Dermilune

22
Q

Where does the acinus empty into?

A

Intercalacted duct

23
Q

Where does the intercalated duct empty into?

A

Striated duct

24
Q

Describe a striated duct?

A

Columnar, have their nucleus in a central position and have prominent striations at their basal surfaces

25
Q

Are the striated duct and intercalated duct interlobular?

A

Yes

26
Q

Where do the striated duct empty into?

A

Excretory duct

27
Q

What are the collecting ducts lined with?

A

Pseudostratified columnar epithelium

28
Q

What happens when the excretory duct merges?

A

The duct becomes larger and near the opening in the oral cavity, the lining of the duct becomes stratified squamous epithelium

29
Q

Where are minor salivary glands found?

A

Scattered throughout the oral mucosa

30
Q

Where are the minor salivary glands absent?

A

Gingiva and the anterior portion of the hard palate

31
Q

What are the Von Ebner’s glands associated with?

A

The circumvallate papillae

32
Q

Function of Von Ebner’s glands?

A

Their serous secretion helps dissolve food molecules to aid taste and also keep the cleft flushed to allow for the next taste

33
Q

What is found in the lamina propria of the oral mucosa?

A

Salivary glands

34
Q

How are the intrinsic skeletal muscle bundles found in directionality?

A

Longitudinal, transverse and vertical

35
Q

What are the functions of salivary glands?

A 
Protection
Buffering
Tooth integrity
Antimicrobial activity
Digestion
Taste
36
Q

Examples of minor glands?

A 
Lingual glands
Minor sublingual glands
Labial glands
Palatine glands
Buccal glands
37
Q

What are the 3 types of oral mucosa?

A

Lining mucosa, masticatory mucosa and specialised mucosa

38
Q

Where is masticatory mucosa found?

A

Covering the hard palate and gingiva

39
Q

Characteristics of masticatory mucosa?

A

It is keratinised or para-keratinised

40
Q

Is lining mucosa keratinised?

A

No

41
Q

Is the vermillion border of the lips keratinised?

A

Yes

42
Q

Functions of mucins?

A

Provide lubrication for oral tissues to move

43
Q

Function of bicarbonate?

A

Protects the teeth from bacterial acids

44
Q

What travels with the septa of salivary glands?

A

Serous acini, mucous acini and mixed acini

45
Q

How is secretion produced?

A

Merocrine secretion

46
Q

How does merocrine secretion occur?

A

Exocytosis

47
Q

What are the different types of duct morphology?

A

Simple and compound

48
Q

What are the different types of arrangements of secretory elements?

A

Tuboacinar

49
Q

What type of glands are salivary glands?

A

Compound tuboacinar glands

50
Q

Intercalated duct epithelium?

A

Simple cuboidal

Histology 2 (12 decks)

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