Histology - Lecture 2 - Oral Cavity

Front 1

Describe the Mucosa of the Tongue on its Dorsal side. Ventral side.

Back 1

-Thick, Stratified, Squamous Keratinized
-Non-Keratinized

Front 2

What type of Tissue are Tonsils?

Back 2

Lymphatic

Front 3

Name the Different types of Papillae on the Tongue.

Back 3

-Filiform
-Foliate
-Fungiform
-Circumvallate

Front 4

Describe Filiform Papillae of the Tongue.

Back 4

-Smallest
-Sharp
-Most Numerous
-Highly Keratinzed, Stratified Epithelium
-No Taste Buds

Front 5

Describe Fungiform Papillae of the Tongue.

Back 5

-Look like little Fungi
-Mushroom-shaped (kinda)
-Scattered
-Mostly at TIps or Sides

Front 6

Describe Foliate Papillae of the Tongue.

Back 6

-Parallel, Low Ridges Separated by Deep Mucosal Clefts
-Many Taste Buds in the Epithelium of the Walls facing Neighboring Papillae
-Small Serous Glands open to clefts

Front 7

Describe Circumvallate Papillae of the Tongue.

Back 7

-3-14
-Large, Dome-shaped
-Surrounded by Sulcus
-Serous Glands open into Base

Front 8

What are the different types of Taste?

Back 8

-Sweet
-Salty
-Sour
-Bitter
-Umami

Front 9

Which types of Papillae have Taste Buds?

Back 9

-Fungiform
-Vallate
-Foliate

Front 10

How often are taste buds replaced?

Back 10

10 days

Front 11

Which part of the Tongue has the Most Tastebuds?

Back 11

Back of the Tongue

Front 12

What taste does CCK correspond to? Do all Sensory Cells contain CCK?

Back 12

-Bitter
-Yes

Front 13

What taste does Neuropeptide Y correspond to? Do all Sensory Cells contain Neuropeptide Y?

Back 13

-Sweet
-No

Front 14

What Types of Cells do we see associated with the Structure of Taste Buds?

Back 14

-Sensory Cells
-Support Cells
-Basal Cells

Front 15

What is Flavor? How is different from Taste?

Back 15

-Perception or Brain Interpretation that is Influenced by Olfactory Input
-Taste is simply the Chemical Reaction

Front 16

Taste Accuracy Declines with Age (>60 years).

Back 16

Taste Accuracy Declines with Age (>60 years).

Front 17

What are the Different Components of a Tooth?

Back 17

-Enamel
-Dentin
-Cementum
-Pulp

Front 18

What is the name of the space that a Tooth is located in?

Back 18

Gingival Sulcus

Front 19

What Connects at Tooth to the Gingival Sulcus?

Back 19

Peridontal Ligament

Front 20

How Does Scurvy affect the Peridontal Ligament?

Back 20

-Lack of Vitamin C
-Weakens it
-Connection (ligament) between Tooth and Gingival Sulcus gets loose

Front 21

Describe Enamel.

Back 21

-Outer Edge
-Sharpest Portion
-Hardest Substance in the Body
-96% Mineral

Front 22

Describe Dentin.

Back 22

-Inner Layer
-More Flexible
-70% Mineral
-Contains Collagen, Proteoglycans, Glycoproteins
-Cell Processes in the Dentinal TUbulues

Front 23

Describe Cementum.

Back 23

-Cement
-Less Mineralized
-Not glued super tight which allows for tooth movement
-Anchored by Peridontal Ligament Fibers

Front 24

Describe Pulp.

Back 24

The stuff in Orange juice that you want to get rid of

Front 25

Describe Pulp.

Back 25

-Loose CT
-Vascular and Nerve Supply

Front 26

What does a tooth form from initially? What 2 Layers form?

Back 26

-Oral Cavity Invagination
-Outer Enamel Epithelium
-Inner Enamel Epitheliam: Contains Ameloblasts which syntheisize Enamel

Front 27

What kinds of cells secrete Enamel? What about Dentin?

Back 27

-Ameloblasts
-Odontoblasts

Front 28

When are Ameloblasts present during life?

Back 28

Only during Development of the Tooth

Front 29

Where are Ameloblasts found? Why? What happens to Ameloblasts?

Back 29

-Outer Surface of the Enamel
-Synthesize Enamel and Leave it Below
-Enamel breaks through and Ameloblasts pull aside and die

Front 30

Where is Saliva Secreted from? Where does Saliva have to pass through before it is in its final form?

Back 30

-Acini of the Salivary Glands
-Salivary Ducts

Front 31

What are the different components of Secretory Unit of Saliva (in order)?

Back 31

-Acinus
-Intercalated Duct
-Striated Duct
-Excretory Duct

Front 32

What kinds of Acini Produce Protein?

Back 32

Serous Acini

Front 33

What kinds of Acini Produce Mucin?

Back 33

Mucous Acini

Front 34

What kinds of Acini Produce Serous and Mucous Secretions?

Back 34

Mixed Acinus

Front 35

What are the different types of Salivary Glands? What do they Secrete?

Back 35

-Parotid - All Serous
-Submandibular - Serous and Mucous
-Sublingual - Almost all Mucous

Front 36

Why would a Serous Acinus have lots of RER?

Back 36

-Secreting Protein
-Has to make it somehow

Front 37

What are Serous Demilunes? Where are they found?

Back 37

-Half-moon shaped
-Found in Mixed Glands
-Attached on the outside of Mucous Tubulues

Front 38

Why do the Striated Ducts have lots of Mitochondria?

Back 38

-Use lots of ATP
-Sodium/Potassium Pump for Water Movement

Front 39

Compare (briefly) the Appearances of the 3 Salivary Gland Types.

Back 39

-Parotid (Serous) - More Blue/Purple
-Sublingual (Mucous) - Light Staining, large, almost alveolar-like
-Submandibular (Mixed) - Mixed

Front 40

Why do Parotid Glands stain dark?

Back 40

-Producing a Serous Secretion
-Contains lots of Protein which stains dark

Front 41

Compare an Interlobular (Intercalated?) vs. Striated Duct.

Back 41

-Interlobular - Not Striated, Bilayered Cells
-Striated - Smaller Hole, Striations

Front 42

Why are Submandibular Glands so pretty?

Back 42

Because they are a mix!

Front 43

How do Plasma Cells get in the Saliva?

Back 43

-Go through CT
-Taken up by Acinar Cells
-Released into Saliva