Epithelial Tissue

Question 1

Tight junctions

Answer 1

Watertight seal between cells
-common in GI tract

Question 2

Adherents junctions

Answer 2

Holds epithelial cells together

Question 3

Gap junctions

Answer 3

Cell communication
muscle and nerve impulses spread from cell to cell (heart and smooth muscle of the gut)

Question 4

Desmosomes

Answer 4

Supports cardiac muscle
Common in epidermis

Question 5

Hemidesmosomes

Answer 5

Found on basement membranes of cells

Question 6

Epithelial functions

Answer 6

Protection, secretion, excretion, absorption, filtration, sensation

Question 7

General features of epithelial tissue

Answer 7

Closely packed cells

Question 8

What surfaces do cells in the epithelial tissue have

Answer 8

Apical surface and a basal surface on the basement membrane

Question 9

Why is it important epithelial tissue is avascular?

Answer 9

Without blood vessels- it receives nutrients and other substances from underlying tissues through diffusion

Question 10

What other tissue type is avascular?

Answer 10

Connective tissue

Question 11

Microvilli

Answer 11

Increase surface area, found in small intestine

Question 12

Cilia

Answer 12

Move microbes and debris up and out of airways in the bronchus of lungs

Question 13

Which layer of epidermis is most mitotically active?

Answer 13

Basal layer

Question 14

What epithelial tissue has microvilli?

Answer 14

Simple columnar epithelium- specialized for absorption

Question 15

What epithelial tissue has cilia?

Answer 15

Pseudostratified columnar epithelium - lines upper respiratory tract

Question 16

What epithelial tissue has goblet cells?

Answer 16

Simple columnar cells- in the gastrointestinal and respiratory tracts

Question 17

What is glandular epithelium?

Answer 17

A single cell of mass of epithelial cells adapted for secretion, derived from epithelial cells that sank below surface during development

Question 18

Endocrine glands

Answer 18

Ductless, secrete hormones into blood stream, hormones help maintain homesostasis

Question 19

Exocrine glands

Answer 19

cells that secrete- sweat, ear wax, salivia, digestive enzymes onto free surface of epithelial layer

Question 20

What are exocrine glands connected to the surface by?

Answer 20

Tubes ( ducts) -

Question 21

Unicellular (single celled) glands

Answer 21

Goblet cells

Question 22

Multicellular glands

Answer 22

Branched ( compound) or unbranched (simple)

Question 23

Simple gland types

Answer 23

Tubular, branched tubular, coiled tubular, branched alveolar

Question 24

Compound types

Answer 24

Tubular, avelolar