Histology of Glands

Question 1

What are the uncommon epithelial types?

Answer 1

stratified cuboidal and stratified columnar

Question 2

Where are stratified columnar and stratified cuboidal located?

Answer 2

Found in ducts of large glands
eg: sweat glands, mammary glands, salivary glands

Question 3

What is an example of a stratified cuboidal gland?

Answer 3

sweat gland

Question 4

What does D represent?

Answer 4

Ducts

Question 5

What is the size of glands?

Answer 5

-Sizes of glands vary:

• Single cell (goblet cell secreting mucus)
• Small microscopic gland (sweat)
• Large organ (liver)

Question 6

What are the 2 categories of glands?

Answer 6

secretory
exocrine

Question 7

What are the 2 types of secretory gland?

Answer 7

exocrine
endocrine

Question 8

Do exocrine gland have ducts?

Answer 8

YES e.g. salivary glands

Question 9

What is an example of an exocrine gland?

Answer 9

salivary

Question 10

Do endocrine gland have ducts?

Answer 10

NO

Question 11

What is an example of an endocrine gland?

Answer 11

thyroid

Question 12

Compare a duct and a gland

Answer 12

• Duct refers to a tube-like structure that carries fluids, such as blood, urine, or digestive juices, from one place to another within the body.
• Gland, on the other hand, is an organ that produces and secretes substances, such as hormones, enzymes, or sweat, either into the bloodstream or onto a surface of the body.

Question 13

What are 2 components of the exocrine glands?

Answer 13

1. secretory component
2. duct

Question 14

What are the 3 modes of secretion of the exocrine glands?

Answer 14

1. eccrine / merocrine
2. Apocrine
3. Holocrine

Question 15

Describe Eccrine / merocrine secretion and an example

Answer 15

secretion occurs by exocytosis
Eg: salivary glands

Question 16

Describe Apocrine secretion and an example

Answer 16

– membrane bound vesicle leaves cell
Eg: mammary gland

Question 17

Describe holocrine secretion and an example

Answer 17

– cell membrane disintegrates to release secretion
Eg: sebaceous glands

Question 18

Describe the morphology of salivary glands

Answer 18

Parotid, submandibular and sublingual; all are tubulo-acinar

Question 19

What type of secretion do salivary glands use?

Answer 19

all eccrine

Question 20

Describe the secretion that salivary glands secrete

Answer 20

Combinations of serous (watery) and mucous (sticky) secreting cells in gland

Question 21

What type of gland is a salivary gland?

Answer 21

exocrine

Question 22

Describe the salivary glands

Answer 22

The salivary glands in many vertebrates including mammals are exocrine glands that produce saliva through a system of ducts.

Question 23

How many paired salivary glands do humans have?

Answer 23

3

Question 24

How many minor salivary glands do humans have?

Answer 24

hundreds

Question 25

What are the 3 classifications of salivary glands?

Answer 25

Parotid, submandibular and sublingual

Question 26

What are names of the minor salivary glands?

Answer 26

lingual, labial, buccal, molar, palatine

Question 27

What is the parotid?

Answer 27

one of the major salivary glands in humans

Question 28

Describe the parotid gland

Answer 28

Multi-lobulated Mainly dark staining serous cells Watery secretions

Question 29

What salivary gland is this an image of?

Answer 29

parotid

Question 30

Describe the submandibular gland

Answer 30

- Large ducts present - Mixture of light staining mucous cells and dark staining serous cells as well as discrete examples of each - Sticky and watery secretions

Question 31

What salivary gland is this an image of?

Answer 31

submandibular

Question 32

Describe the sublingual salivary gland

Answer 32

Large ducts present Mainly light staining mucous cells Sticky secretions

Question 33

What salivary gland is shown

Answer 33

sublingual

Question 34

Where would you find the submandibular duct?

Answer 34

ducts under the tongue

Question 35

Where would you find the parotid salivary duct?

Answer 35

ducts drain near the upper teeth

Question 36

Where would you find the sublingual duct?

Answer 36

through many ducts in the floor of the mouth

Question 37

What gland is shown here?

Answer 37

Sublingual – Note pale staining mucus cells; mixed gland - predominantly mucous

Question 38

What salivary gland is shown here?

Answer 38

Note dark staining serous cells; completely serous gland (D = Duct, SA = Serous Acini) parotid

Question 39

What salivary gland is shown here?

Answer 39

Note mixed serous/mucous acini = serous demilunes; (Serous means watery/enzymic) - submandibular

Question 40

Name this gland shape

Answer 40

simple or tubular

Question 41

Name this gland shape

Answer 41

coiled

Question 42

Name this gland shape

Answer 42

Acinar

Question 43

Name this gland shape

Answer 43

Branched

Question 44

Describe this gland shape

Answer 44

Tubulo-acinar e.g. salivary glands