Salivary Glands and Oral Mucosa

Question 1

What does the oral mucosa consist of?

Answer 1

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

Question 2

Where is the epithelium keratinised in the oral mucosa?

Answer 2

Dorsum of tongue, hard palate and oral gingiva

Question 3

Where are the areas lacking keratin in oral mucosa?

Answer 3

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

Question 4

What is the nasal cavity lined with?

Answer 4

Respiratory epithelium

Question 5

What is the dorsal surface of the tongue lined with?

Answer 5

Keratinised stratified squamous epithelium

Question 6

What are the different tongue papillae?

Answer 6

Filiform, Fungiform, Foliate and Circumvallate

Question 7

Describe Filiform Papillae?

Answer 7

Conical shape, no taste buds, heavily keratinised

Question 8

Describe Fungiform Papillae?

Answer 8

Blunt, taste buds

Question 9

Describe Foliate Papillae?

Answer 9

Slit-like on margin of tongue, taste buds

Question 10

Describe Circumvallate Papillae?

Answer 10

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

Question 11

What are taste buds?

Answer 11

Multicellular chemoreceptive units formed form modified epithelial cells which are innervated

Question 12

What are the three major salivary glands?

Answer 12

Parotid, Submandibular and Sublingual glands

Question 13

Where are the major salivary glands found?

Answer 13

Outside the oral cavity

Question 14

What is the structure of salivary glands?

Answer 14

Stroma and parenchyma

Question 15

What is parenchyma?

Answer 15

A compound of tubule-acinar glands

Question 16

How does merocrine secretion occur?

Answer 16

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

Question 17

The secretory elements of salivary glands are classified as what?

Answer 17

Serous or mucous

Question 18

What do serous cells secrete?

Answer 18

A thin watery secretion that contains proteins and ions

Question 19

What do mucous cells secrete?

Answer 19

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

Question 20

Where do mucous cells tend to be found?

Answer 20

In the tubular element of the tubuloacinar glandular structure

Question 21

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

Answer 21

Serous Dermilune

Question 22

Where does the acinus empty into?

Answer 22

Intercalacted duct

Question 23

Where does the intercalated duct empty into?

Answer 23

Striated duct

Question 24

Describe a striated duct?

Answer 24

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

Question 25

Are the striated duct and intercalated duct interlobular?

Answer 25

Yes

Question 26

Where do the striated duct empty into?

Answer 26

Excretory duct

Question 27

What are the collecting ducts lined with?

Answer 27

Pseudostratified columnar epithelium

Question 28

What happens when the excretory duct merges?

Answer 28

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

Question 29

Where are minor salivary glands found?

Answer 29

Scattered throughout the oral mucosa

Question 30

Where are the minor salivary glands absent?

Answer 30

Gingiva and the anterior portion of the hard palate

Question 31

What are the Von Ebner's glands associated with?

Answer 31

The circumvallate papillae

Question 32

Function of Von Ebner's glands?

Answer 32

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

Question 33

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

Answer 33

Salivary glands

Question 34

How are the intrinsic skeletal muscle bundles found in directionality?

Answer 34

Longitudinal, transverse and vertical

Question 35

What are the functions of salivary glands?

Answer 35

``` Protection Buffering Tooth integrity Antimicrobial activity Digestion Taste ```

Question 36

Examples of minor glands?

Answer 36

``` Lingual glands Minor sublingual glands Labial glands Palatine glands Buccal glands ```

Question 37

What are the 3 types of oral mucosa?

Answer 37

Lining mucosa, masticatory mucosa and specialised mucosa

Question 38

Where is masticatory mucosa found?

Answer 38

Covering the hard palate and gingiva

Question 39

Characteristics of masticatory mucosa?

Answer 39

It is keratinised or para-keratinised

Question 40

Is lining mucosa keratinised?

Answer 40

No

Question 41

Is the vermillion border of the lips keratinised?

Answer 41

Yes

Question 42

Functions of mucins?

Answer 42

Provide lubrication for oral tissues to move

Question 43

Function of bicarbonate?

Answer 43

Protects the teeth from bacterial acids

Question 44

What travels with the septa of salivary glands?

Answer 44

Serous acini, mucous acini and mixed acini

Question 45

How is secretion produced?

Answer 45

Merocrine secretion

Question 46

How does merocrine secretion occur?

Answer 46

Exocytosis

Question 47

What are the different types of duct morphology?

Answer 47

Simple and compound

Question 48

What are the different types of arrangements of secretory elements?

Answer 48

Tuboacinar

Question 49

What type of glands are salivary glands?

Answer 49

Compound tuboacinar glands

Question 50

Intercalated duct epithelium?

Answer 50

Simple cuboidal