Epithelial Tissue

Question 1

Epithelial Tissue Functions, what are they?

Answer 1

Physical Protection.
Selective permeability.
Secretions.
Sensations.

Question 2

Polarity of epithelial tissue?

Answer 2

Apical surface, lined with Cilia or Microvilli, exposed to external environment.
Basal surface, attached to connective tissue.

Question 3

Avascularity, Innervation, Regeneration Capacity?

Answer 3

Lacks blood vessels
Detects changes in environment, richly innervated.
High regeneration capacity.

Question 4

What are the two cell layers?

Answer 4

Simple, one layer
Stratified, 2 or more layers.

Question 5

What are the cell shapes?

Answer 5

Squamous - flat
Cuboidal - cube, box
Columnar - tall & narrow

Question 6

What are the four categories of simple epithelia

Answer 6

Simple Squamous
Simple Cuboidal
Simple Columnar(ciliated/nonciliated)
Pseudostratified columnar(ciliated/nonciliated)

Question 7

What are the four categories of stratified epithelium

Answer 7

Stratified squamous
Stratified cuboidal
Stratified columnar
Transitional

Question 8

What is pseudostratified? What is transitional epithelium?

Answer 8

Pseudostratified - one layer of tall cells that appears stratified
Transitional - multiple layers of cells that change shape when stretched

Question 9

Categories of stratified squamous

Answer 9

Keratinized
Nonkeratinized

Question 10

Function and location of simple squamous

Answer 10

rapid diffusion and filtration, secretion.
Air sacs in lungs(alveoli), lining of lumen of blood vessels and lymph, serous membranes.

Question 11

Function and location of simple cuboidal

Answer 11

Absorption and Secretion
Kidney tubules, thyroid gland follicles, surface of ovary.

Question 12

Function and location of nonciliated simple columnar

Answer 12

Absorption and secretion, secretion of mucin.
Inner lining of most of digestive tract

Question 13

Function and Location of ciliated simple columnar

Answer 13

Secretion of mucin and movement of mucus along apical surface.
air passageways of lung and uterine tubes.

Question 14

Function and Location of nonciliated pseudostratified columnar

Answer 14

protection
rare - lining of part of the male urethra and epididymis

Question 15

Function and Location of ciliated pseudostratified columnar

Answer 15

protection, secretion of mucin and movement of mucus.
lining of airways of respiratory tract, nasal cavity, trachea.

Question 16

Function and Location of keratinized stratified squamous

Answer 16

protection of underling tissue from abrasion
epidermis of skin.

Question 17

nonkeratinized stratified squamous

Answer 17

protection of underlying tissue from abrasion
lining of oral cavity, vagina, anus, esophagus.

Question 18

Function and location of stratified cuboidal

Answer 18

protection and secretion
ducts of most exocrine glands and ovarian follicles.

Question 19

F and L of stratified columnar

Answer 19

protection and secretion
large ducts of salivary glands, conjunctiva covering the eye, male urethra.

Question 20

F and L of Transitional

Answer 20

Accommodates urine volume changes in urinary bladder
lining of urinary bladder, ureters.