1.7 Epithelium II

Question 1

What do exocrine glands in the epithelium have?

Answer 1

Excretory ducts

External secretion

Question 2

What do endocrine glands have?

Answer 2

No ducts and internal secretion

Question 3

Exocrine glands are classified by?

Answer 3

Number of cells (Uni or multi)
Branching of duct system (simple or compound)
Morphology of secretory units (tubular or acinar)
Method of secretion (merocrine, apocrine, holocrine)

Question 4

Describe holocrine secretion

Answer 4

The cell dies and whole contents of cell’s secreted by glands

Question 5

Describe merocrine secretion

Answer 5

Secretion of the cell is transported out in vesicles via exocytosis
- Doesn’t damage the cell

Question 6

Describe apocrine secretion

Answer 6

Portions of the cell are pinched off and secreted out of cell

Question 7

Exocrine glands are classified by what?

Answer 7

The nature of the secretory product

Sebum, sweat, colostrum, cerumen

Question 8

What are the types of secretory products in exocrine glands?

Answer 8

Mucous (lubricates a surface)
Serous (only seen in pancreas)
Mixed (have both mucous and serous)

Question 9

Define parenchyma

Answer 9

Functional part of epithelium

Question 10

Define stroma

Answer 10

Framework (connective tissue)

Question 11

What are the basic functional units of myoepithelial cells?

Answer 11

Secretory cells (Acinar)
Duct cells (intercalated and striated)
Myoepithelial cells

Question 12

What are ion-transporting cells?

Answer 12

• Energy intensive cells
• Deep basal infolding of plasma membrane (mitochondria sits on the infoldings)
• Specialized for active transport

Question 13

What are examples of pinocytotic vesicle transporting cells?

Answer 13

Endothelial and mesothelial cells

Question 14

Describe protein synthesizing cells

Answer 14

• Have numerous free ribosomes and polyribosomes, or extensive RER
• Lots of mitochondria

Question 15

Describe mucous secreting cells

Answer 15

• Well developed golgi complex
• RER in basal portion of cell
• Ex: goblet cell and mucous salivary gland

Question 16

Mucous secreting cells have a nucleus that is ___ ___ in the ___ of cell if it is a goblet cell

Answer 16

Flattened vertically

Stem

Question 17

Mucous secreting cells have a nucleus that is ___ at the ___ of the cell if it’s a salivary gland

Answer 17

Flattened

Base

Question 18

Describe steroid secreting cells

Answer 18

• Have a central round nucleus
• Shape = polyhedral or round acidophilic cell
• Have an extensive SER
• Most are lipid associated
• Don’t need to be polarized
• No ribosomes
• Ex: adrenal gland, testes, ovaries