Lab 1 - Epithelium

Question 1

What are the 4 main tissue types that organs are composed of?

Answer 1

1. nervous
2. connective
3. muscle
4. epithelial

Question 2

Parenchyma vs. Stroma

Answer 2

parenchyma - tissue that performs specific functions of an organ

stroma - everything else (connective, blood vessels, nerves, ducts)

Question 3

What are the 8 distinct types of epithelium?

Answer 3

1. simple squamous
2. simple cuboidal
3. simple columnar
4. keratinized stratified squamous
5. non-keratinized stratified squamous
6. stratified cuboidal
7. stratified columnar
8. pseudostratified columnar ciliated
9. transitional

Question 4

What do the terms “simple” and “stratified” mean regarding epithelium?

Answer 4

simple - one cell layer thick

stratified - multiple cell layers thick

Question 5

Identify tissue type
a. identify white circles
b. identify blue lines

Answer 5

simple cuboidal epithelium (kidney cortex)
a. lumen
b. basement membrane

Question 6

Identify tissue and structures

Answer 6

a. goblet cells
b. simple columnar epithelium
c. lumen

Question 7

Identify tissue and structures

Answer 7

a. lumen
b. pseudostratified epithelium
c. cilia
d. basement membrane

Question 8

Identify tissue and structures

Answer 8

a. lumen
b. keratinized stratified squamous epithelium
c. non-keratinized squamous epithelium
d. basement membrane

Question 9

Type of tissue and where can this be found?

Answer 9

stratified cuboidal epithelium

sweat glands (have a lumen and basement membrane)

Question 10

Identify tissue and structures

Answer 10

a. pseudostratified epithelium
b. stereocilia
c. lumen
d. basement membrane

Question 11

Identify

Answer 11

Urinary bladder - distended

Question 12

Identify

Answer 12

urinary bladder - collapsed

Question 13

Identify the yellow and green circle structures

Answer 13

yellow: mucous
green: serous

Question 14

How do you distinguish keratinized from non-keratinized stratified squamous?

Answer 14

keratinized - no nucleus

non-keratinized - nucleus

Question 15

What are the 3 apical modifications?

Answer 15

1. cilia
2. stereocilia
3. microvilli

Question 16

What are the differences between cilia and stereocilia?

Answer 16

cilia - symmetric, uniform, distinguishable

stereocilia - hairlike, wiry, allover the place

Question 17

What is the difference between diagnosing a serous vs. mucous glandular cell?

Answer 17

serous gland - picks up stain - darker pink/purple

mucous gland - doesn’t pick up stain - light pink/white

Question 18

If cell boundaries are not quite clear in epithelium, what characteristic can help you in diagnosing which type of epithelium is present?

Answer 18

1. location of nucleus
2. size of nucleus