Lecture 6 Epithelial Glands

Question 1

2 Types of Glandular Epithelium

Answer 1

1. Exocrine

2. Endocrine

Question 2

Exocrine glands

Answer 2

Epithelial outgrowths into underlying connective tissue that retain connection to the overlying epithelium in form of one or more ducts
Secrete product through a duct and onto epithelium or into a duct lined in epithelium

Question 3

Endocrine glands

Answer 3

Have lost connection, they are ductless. Had one when forming, their product is systemic

Question 4

2 Types of Endocrine

Answer 4

1. Paracrine - affects neighbors

2. Autocrine - self affected

Question 5

Paracrine

Answer 5

Secretion affects neighboring cells

Question 6

Autocrine

Answer 6

Secretion affects self

Question 7

3 Ways to classify glands

Answer 7

1. Number of cells
2. Absence or presence of ductal dranching
3. Shape of secretory portion

Question 8

Unicellular

Answer 8

Columnar epithelium - one cell comprises the gland

Ex. Goblet cell - secretes mucous, look like mini wine glasses, look clear blue, no duct

Question 9

Multicellular

Answer 9

NOT unicellular

gland made of multiple cells

Question 10

2 ways to name gland based on number of cells

Answer 10

Unicellular

Multicellular

Question 11

Classification of glands based on absence or presence of ductal branching

Answer 11

1. Simple

2. Compound

Question 12

Classification of glands based on shape of secretory portion

Answer 12

1. Tubular
2. Acinar - aka Alveolar - flask shaped
3. Tubulo-alveolar (-acinar)

Question 13

2 Types of multicellular glands

Answer 13

1. Simple excretory duct
   (tubular, coiled, tubular branched, acinar/alveolar)
2. Compound (branched) excretory duct
   (branched tubular, branched acinar, branched tubulo-acinar)

Question 14

Organization of Compound (branched) excretory duct:

Answer 14

Capsule
Septa or trabeculae (divide gland into lobules and lobes)
Lobe
Lobule

Question 15

Capsule

Answer 15

Connective tissue sheath that surronds the compound excretory duct

Question 16

Septa

Answer 16

aka Trabeculae
Extensions of capsule that extend into the gland
Divide gland into lobules and lobes

Question 17

Lobe

Answer 17

Larger than lobule

Question 18

Lobule

Answer 18

Little lobe

Smallest anatomical part of gland

Question 19

3 Types Lobule

Answer 19

1. Intralobular duct
2. Striated/intercalated duct - microscopically they have invaginations on surface domain for increased surface domain
3. Acinus
   - Musous
   - Serous
   - Serous-mucous (mixed)

Question 20

Intralobular duct

Answer 20

Intra = within

Within a lobule

Question 21

Striated/intercalated duct

Answer 21

Intralobular duct
Microscopically they have invaginations on surface domain for increased surface area
Often have high E job

Question 22

Mechanism of secretion (classification of glands) 3 ways to classify

Answer 22

1. Merocrine (eccrine) - seous - these two go together, cells remain intact. many of these in body
2. Apocrine - secretory product is thicker, most of cell intact and can be repaired Ex. Mammary and sweat glands
3. Holocrine - secretion is too thick to get out of cell and it bursts. Ex. sebum

Question 23

Compound Gland Acinus

Answer 23

Secretory part of the gland
Basement membrane (sits on this)
Myoepithelial cells - these surround the cells on the outside. Spindle shaped, derived from epithelium

Question 24

5 Structures of Compound Gland

Answer 24

1. Intralobular
2. Interlobular
3. Intralobular
4. Lobar duct
5. Main duct