Lab 10 - Salivary Glands And Tongue

Front 1

What is the secretory portion of salivary glands made up of?

Back 1

-Parenchyma
-Stromal tissue

Front 2

What drains the secretory portion?

Back 2

A ductal system

Front 3

What type of cells make up the secretory portion?

Back 3

Mucous and/or serous cells

Front 4

How are the mucous/serous cells arranged?

Back 4

Into acini

Front 5

What are the 3 duct types in the hierarchy of salivary gland duct systems?

Back 5

1. Intercalated
2. Striated
3. Excretory

Front 6

Do the salivary glands have a capsule?

Back 6

Yes - it dives into the parenchyma and forms septations.

Front 7

What do the septations of parenchymal tissue in salivary glands create?

Back 7

Lobules

Front 8

What lies within the septations?

Back 8

Vascular and neural components

Front 9

What ducts can you clearly see within the parotid gland at low power magnification?

Back 9

Excretory ducts

Front 10

What are the ducts that flow into the excretory ducts?

Back 10

Striated ducts

Front 11

What ducts flow into striated?

Back 11

Intercalated

Front 12

Can you really see intercalated ducts even at high power?

Back 12

No - they're pinpoint surrounded by a layer of cells

Front 13

What type of epithelial cells make up intercalated ducts?

Back 13

Simple cuboidal

Front 14

Are intercalated ducts very easy to see?

Back 14

Not really

Front 15

What's easier to see?

Back 15

Striated ducts

Front 16

Why are striated ducts easier to see?

Back 16

because they have wider and more open lumens, with a clearly ring-shaped cell wall.

Front 17

What type of cells make up the epithelium of striated ducts?

Back 17

Simple cuboidal to low columnar

Front 18

Why are these ducts called striated?

Back 18

Bc the basal membranes have infoldings projecting up into the cytoplasm.

Front 19

What is found within striations of striated ducts?

Back 19

Mitochondria

Front 20

What is done with the ATP from these mitochondria?

Back 20

It fuels Na ATPases that remove ions from the duct fluid to make it hypotonic.

Front 21

What term do we use to describe intercalated and striated ducts?

Back 21

Intralobular - they lie within lobules.

Front 22

What do striated ducts join to form?

Back 22

Excretory ducts

Front 23

What type of ducts are excretory? Why?

Back 23

Interlobular - because they lie within septations that are BETWEEN lobules.

Front 24

What type of cells lie within excretory ducts?

Back 24

Goblet cells

Front 25

What type of epithelial cells line the MAIN duct of the parotid gland?

Back 25

Stratified squamous (nonkeratinized)

Front 26

What type of acini compose the parenchyma of the PAROTID gland?

Back 26

Serous - very pink

Front 27

2 things that serous cells secrete:

Back 27

-Antibodies
-Enzymes

Front 28

Where are the secretory products of serous acini stored?

Back 28

In granules at their apical cytoplasm.

Front 29

What glands secrete mucous secretions?

Back 29

-Submandibular (more)
-Sublingual (less)

Front 30

How can you tell apart mucous versus serous acini?

Back 30

Serous = dark pink + granules

Mucous = foamy/light + no granules

Front 31

If you saw a fairly low power slide of the parotid gland what would really stand out?

Back 31

That it's really pink

Front 32

What about if you saw that of the submandibular gland?

Back 32

It's lacy blue and very pale (with H/E)

Front 33

What if you saw a slide of the sublingual gland?

Back 33

It looks very mixed up and polka dotted

Front 34

How does the submandibular gland appear when stained with
-PAS
-H/E

Back 34

PAS = very dark pink mucous acini - and they're pretty few and far between
H/E = very light and hard to distinguish

Front 35

What is it called when serous cells are sitting on top of a mucous acinus?

Back 35

Serous demilune

Front 36

Relative ratio of secretory units present in the Parotid gland:

Back 36

Mostly Serous

Front 37

Relative ratio of secretory units present in the Submandibular gland:

Back 37

-Mostly serous
-Some mucous

Front 38

Relative ratio of secretory units present in the Sublingual gland:

Back 38

-Less serous
-Mostly mucous

Front 39

3 types of papillae on the tongue:

Back 39

-Filiform
-Fungiform
-Circumvallate

Front 40

How can you tell what Filiform papillae are?

Back 40

They have a HIGHLY KERATINIZED surface projection (wispies)

Front 41

What is located next to filiform papillae?

Back 41

Fungiform papillae

Front 42

What do fungiform papillae look like?

Back 42

They are chunky and kind've mushroomy

Front 43

What distinguishes CIRCUMVALLATE papillae?

Back 43

They are also chunky, but have prominent clefts on either side.

Front 44

What is located within the lateral walls of circumvallate papillae?

Back 44

Taste buds