Histo: Oral Cavity And Glands

Front 1

Vestibule: defn

Back 1

Internal to lips and cheeks, as far back as teeth

Front 2

What does a mucosa consist of?

Back 2

Epithelium and underlying connective tissue

Front 3

Where is masticatory mucosa present?

Back 3

Gingiva, dorsum of tongue, hard palate

Front 4

What kind of epithelium does masticatory mucosa have?

Back 4

Stratified squamous keratinized (parakeratinized)

Front 5

What is in the connective tissue of masticatory mucosa ?

Back 5

Meissner's corpuscles and minor salivary glands (mostly mucus secreting)

Front 6

What is parakeratinized epithelium?

Back 6

no stratum granulosum in this epithelium, and the cells in the surface layer retain their nuclei. very robust and tough.

Front 7

Where is lining mucosa found?

Back 7

everywhere in mouth except dorsum of tongue, gingiva, and hard palate (areas not involved with chewing)

Front 8

What are the minor salivatory glands in the connective tissue of lining mucosa classified as morphologically?

Back 8

Compound tubuloacinar

Front 9

What cell type forms <b>enamel</b>?

Back 9

Amelioblasts (lost as tooth erupts)

Front 10

What cell type forms <b>dentin?</b>

Back 10

Odontoblasts. They continue making dentin throughout life

Front 11

What forms the crown of the tooth?

Back 11

Enamel and dentin

Front 12

Layers of the tooth, from outside to in

Back 12

Enamel; dentin; odontoblast layer; pulp cavity

Front 13

What does the pulp cavity contain?

Back 13

Gelatinous connective tissue with blood vessels, nerves, and lymphatics. Odontoblasts are at the periphery

Front 14

What are lines in the tooth enamel, laid down while tooth is developing?

Back 14

Stria

Front 15

What is cementum?

Back 15

Layer composed of 50% Calcium hydroxyapatite, and 50% organic matter (collagen, glycoproteins and proteoglycans)

Softer than dentin

made by cementoblasts

Front 16

What cells make cementum?

Back 16

Cementoblasts

Front 17

What separates the anterior 2/3 and posterior 1/3 of tongue?

Back 17

Sulcus terminalis

Front 18

What is the type of epithelium on the tongue?

Back 18

Stratified squamous keratinized (parakeratinized)

Front 19

Where are tongue papillae found?

Back 19

Dorsum of tongue

Front 20

What are the 4 types of papillae?

Back 20

1) Filiform - flame like, for chewing, no taste buds
2) Fungiform
3) Circumvallate
4) Foliate

Front 21

What type of papillae are flame-shaped, covered by parakeratinized epithelium, and have no taste buds associated with them?

Back 21

Filiform

Front 22

What are the most numerous papillae?

Back 22

Filiform

Front 23

What type of papillae are mushroom shaped, appear red, covered by parakeratinized epithelium?

Back 23

Fungiform

Front 24

What are the largest papillae, about 10-15 of them, mushroom shaped and surrounded by a deep furrow, with taste buds along lateral surface?

Back 24

Circumvallate

Front 25

What glands are associated with the circumvallate papillae, secrete serous, watery fluid to help wash out their troughs?

Back 25

von Ebners

Front 26

What types of papillae are taste buds associated with?

Back 26

Fungiform, circumvallate, and foliate papillae

Front 27

What papillae are poorly developed in humans, contain taste buds, and are located along lateral edge of tongue? folded slightly, giving the appearance of a leaf.

Back 27

Foliate

Front 28

What CN innervates general sensation to tongue?

Back 28

CN V

Front 29

What CN innervates taste sensation to anterior 2/3 of tongue?

Back 29

CN VII (chorda tympani division of facial nerve)

Front 30

What CN innervates taste sensation to posterior 1/3 of tongue?

Back 30

CN IX (Glossopharyngeal)

Front 31

What type of stimuli are the taste buds on the posterior 1/3 more likely to pick up?

Back 31

Noxious stimuli, more widely scattered

Front 32

Muscle innervation of the tongue

Back 32

CN XII

Front 33

Minimal physiological parenchymal unit (acinus + its duct that modifies the product)

Back 33

Salivon

Front 34

What type of gland is the parotid?

Back 34

compound acinar

Front 35

What type of gland are submandibular and sublingual?

Back 35

compound tubuloacinar

Front 36

What are the component cells of the acini and/or tubular glands?

Back 36

1) serous - parotid parenchymal, portion of population of submandibular and sublingual glands

2) mucus - only submandibular and sublingual

3) Myoepithelial cells - all three major types of salivary glands

Front 37

What type of cells are found in all three types of major salivary glands, contractile cells with processes embracing secretory cells of acini?

Back 37

Myoepithelial cells

Front 38

What type of component gland cells are only found in submandibular and sublingual glands, show mucinogen granules in apical cytoplasm and prominent Golgi

Back 38

Mucus cells

Front 39

What type of component gland cells are found in only parenchymal cells of parotid glands but also a portion of submandibular and sublingual glands, release granules in response to parasympathetic nervous stimulation, and can form serous demilunes

Back 39

Serous

Front 40

What type of duct:
-simple cuboidal epithelium
-most prominent in parotid glands
-cells add bicarb to saliva

Back 40

Intercalated ducts (always intralobular)

Front 41

What type of duct:
-simple columnar epithelium
-intensely eosinophilic (lots of mitochondria)
-extensive cell jxns
-75% of saliva
-remove Na+ and Cl- from saliva

Back 41

Striated ducts

Front 42

What type of duct:
-may be either pseudostratified or stratified columnar epithelium
-largest excretory ducts lined by stratified squamous

Back 42

interlobular and excretory

Front 43

What are the chief components of saliva?

Back 43

Water, proteins, electrolytes, IgA

Front 44

saliva: hypo or hypertonic

Back 44

hypo

Front 45

Difference between saliva produced by parasympathetic vs. sympathetic?

Back 45

Parasympathetic is waterier, sympathetic is thicker and more mucousy

Front 46

Which gland:
-compound acinar
-serous acini only
-striated ducts prominent

Back 46

parotid

Front 47

Which gland:
-compound tubuloacinar
-serous and mucus acini (serous acini dominant)
-striated ducts prominent

Back 47

Submandibular

Front 48

Which gland:
-striated ducts poorly developed
-compound tubuloacinar
-serous and mucus acini (mucus dominant)

Back 48

Sublingual

Front 49

What muscle makes up the lip?

Back 49

Orbicular oris

Front 50

What lining covers the inner surface of the lip?

Back 50

Lining mucosa

Front 51

What type of epithelium is in the vermillion zone?

Back 51

Keratinized stratified squamous epithelium. no hair

Front 52

What imparts red color to vermillion zone?

Back 52

numerous, densely packed Papillae of lamina propria allow blood vessels close access to surface

Front 53

What type of epithelium is in the mucosal surface of lip?

Back 53

moist stratified squamous

Front 54

Where are the labial glands located? What are they?

Back 54

They're minor salivary glands located on the inside of the lip in the submucosa layer under the lamina propria

Front 55

What type of secretions do the labial glands secrete?

Back 55

Mucus and serous. Ducts enter vestibule of oral cavity

Front 56

What is orthokeratinized epithelium?

Back 56

Same as skin (same layers). uppermost layer is flattened dead cells. abrasion protection

Front 57

What is parakeratinized epithelium?

Back 57

Surface layer of cells is partially keratinized; retaining pyknotic nuclei and organelles. often lacking granulosa layer.

Front 58

Which is pinker, masticatory or lining mucosa? Why?

Back 58

Lining mucosa. There is a superficial layer of blood vessels in the mubmucosa (not present in masticatory)

Front 59

Where is specialized mucosa found? What makes it special?

Back 59

Dorsum of tongue. Organized into papillae, some of which contain taste receptors.

Front 60

What is the lamina propria analogous to from skin?

Back 60

dermis

Front 61

What are the parts of the lamina propria?

Back 61

Papillary- more superficial
reticular - deeper and denser

Front 62

Which layer is the submucosa underneath?

Back 62

lamina propria

Front 63

in what layer are the minor salivatory glands found?

Back 63

submucosa

Front 64

Where are the circumvallate papillae located?

Back 64

Along sulcus terminalis

Front 65

What layer comprises the bulk of tooth and is formed throughout life?

Back 65

Dentin

Front 66

True/false: Pulp chamber stays same size throughout life

Back 66

False. Pulp chamber gets smaller because odontoblasts build dentin inward

Front 67

What extends between the cementum of tooth and alveolar bone, suspending tooth between these two hard tissues?

Back 67

The periodontal ligament (PDL)

Front 68

What is the socket of the tooth called?

Back 68

Alveolus. Formed by alveolar bone.

Front 69

What is the hardest calcified tissue in the body?

Back 69

Enamel

Front 70

Is enamel replenished throughout life?

Back 70

no

Front 71

Dentin underlies enamel AND cementum: True/false

Back 71

True

Front 72

What is mineralized dental tissue covering roots of tooth, formed continously thru life?

Back 72

cementum

Front 73

Of all the tooth tissues, which is most similar to bone?

Back 73

Dentin

Front 74

What is organic matrix of dentin?

Back 74

predentin, secreted by odontoblasts

Front 75

Where does dentin formation begin?

Back 75

Dentinoenamel junction

Front 76

Which salivatory gland has most extensive duct system?

Back 76

parotid

Front 77

What are the smallest intralobular ducts?

Back 77

intercalated. they secrete bicarb ions and absorb chloride ions

Front 78

What do intercalated ducts enlarge to form?

Back 78

Striated ducts

Front 79

What do striated ducts converge to form?

Back 79

interlobular ducts

Front 80

How does the epithelium change as it goes from an intercalated duct to a larger intralobular duct?

Back 80

Simple squamous to simple cuboidal

Front 81

What is striated duct lined with?

Back 81

Simple columnar epithelium