Tissues

Question 1

Epithelial Tissue

Answer 1

Apical surface is toward a lumen (open space)
Lateral surfaces are toward other epithelial cells
Basal surface is toward the basement membrane

Cells are attached by cell junctions

Epithelial tissue is avascular (lacks circulatory system)
Nerves only send projections into tissue

Question 2

Cell Junctions

Answer 2

-Tight junctions
 zip-lock seal
 intestines
-Gap junction
 tunnels for
 large molecules
-Adherence junctions
 Velcro seals
 holds cells together
-Desmosomes
 dots of Velcro
-Hemidesmosomes
 Velcro to basement membrane

Question 3

Lining epithelium

Answer 3

Covers the surfaces of the body (internal and external

Question 4

Naming epithelial tissues

Answer 4

The number of layers of cells
-One layer
  Simple
-More than one layer
	Stratified

Question 5

Where is simple squamous located? And function?

Answer 5

One layer of squamous shaped cells
Location:
Lungs

Function:
Gas exchange

Question 6

Simple Cuboidal

Answer 6

One layer of cuboidal cells
Location:
 Tubules of kidneys
 Pancreas
 Thyroid

Basic cell shape

Question 7

Simple Columnar

Answer 7

One layer of columnar cells
Location:
Small intestine

Function:
Tight junctions seal spaces
between cells
Absorption of nutrients

Question 8

Stratified Squamous

Answer 8

Multiple layers
Outer layer squamous
Location:
  Skin
  Mouth
  Esophagus

Function:
Protection against mechanical
stress (sharp objects)

Question 9

Stratified Cuboidal

Answer 9

Multiple layers
Outer layer cuboidal
Location:
  Sweat glands
  Salivary glands

Rare

Question 10

Stratified Columnar

Answer 10

More than one layer
Outer layer columnar
Location:
  Male urethra
  Epididymis
  Mammary glands

Rare

Question 11

Pseudostratified

Answer 11

Single layer
Looks like several layers
Location:
Trachea

Function:
Mucous cells and cilia
remove particles