Histology - Epithelial Tissue

Question 1

What is Epithelial Tissue?

Answer 1

Tissue composed of cells that line the cavities and surfaces of structrues throughout the body

Question 2

Identify the following

Answer 2

Simple Squamous

Simple Cuboidal

Simple Columnar

Question 3

Identify the following

Answer 3

Stratified Squamous

Stratified Cuboidal

Pseudostratified Columnar

Question 4

Where is Simple Squamous Epithelium located?

Answer 4

Air sacs in lungs (alveoli)

Lining lumen of blood vessels (endothelium

Serous membranes of body cavities (mesothelium)

Question 5

Identify the Following

Answer 5

Simple Squamous Epithelium

Question 6

Identify the Following

Answer 6

Keratinized Stratified Squamous Epithelium

Question 7

Where is Keratinezed Stratified Squamous Epithelium located?

Answer 7

Epidermis (skin)

Question 8

Identify the Following

Answer 8

Nonkeratinezed (moist) Stratified Squamous Epithelium

Question 9

Where is Nonkeratinized Stratified Squamous Epithelium located?

Answer 9

Lining of oral cavity

Part of: pharynx, esophagus, vagina, and anus

Question 10

Identify the following

Answer 10

Simple Cuboidal Epithelium

Question 11

Where is Simple Cuboidal Epithelium located?

Answer 11

Thyroid gland follicles

Kindey tubules

ducts and secretory regions of many glands

Question 12

Identify

Answer 12

Stratified Cuboidal Epithelium

Question 13

Where is Stratified Cuboidal Epithelium located?

Answer 13

Large ducts in most exocrine glands

Some parts of the male urethra

Question 14

Identify

Answer 14

Ciliated Simple Columnar Epithelium

Question 15

Where is Ciliated Simple Columnar Epithelium located?

Answer 15

Lining of uterine tubes

Larer bronchioles of respiratory tract

Question 16

Identify

Answer 16

Simple Columnar Epithelium

Question 17

Where is (nonciliated) Simple Columnar Epithelium located?

Answer 17

Lining most of GI tract

Question 18

Identify

Answer 18

Stratified Columnar Epithelium

Question 19

Where is Stratified Columnar Epithelium located?

Answer 19

(Rare)

Large ducts of some exocrine glands

Some regions of the male urethra

Question 20

Identify

Answer 20

Pseudostratified Columnar Epithelium

Question 21

Where is Pseudostratified Columnar Epithelium located?

Answer 21

Cilitated form lines most of the respiratory tract

-nasal cavity; part of pharynx, larynx, trachea, bronchi

Question 22

Identify

Answer 22

Transitional Epithelium

Question 23

Where is Transitional Epithelium located?

Answer 23

Lining of:

Urinary bladder

Ureters

Part of urethra

Question 24

Epithelial Cells are connected to each other how?

Answer 24

Cell Junction and Extracellular Material

Question 25

Epithelial tissues generally contain ______ \_\_\_\_\_ but no _____ \_\_\_\_\_\_\_

Answer 25

Nerve endings Blood vessels

Question 26

4 Junctions and extracellular material?

Answer 26

Tight Junctions Adhering Junctions Desmosomes Gap Junctions

Question 27

What are Tight Junctions for?

Answer 27

Prevent molecules from traveling between epithelial cells

Question 28

What do Adhering Junctions do?

Answer 28

Surround the cell *deep* to tight junctions

Question 29

What are Desmosomes for?

Answer 29

"Buttons" between two adjacent cells that help strengthen sheets of epithelial cells [Appear at locations of mechanical stress and are often continuous w/intermediate filaments]

Question 30

What runs between desmosomes and hemidesmosomes?

Answer 30

Intermediate Filaments

Question 31

What are Gap Junctions for?

Answer 31

Allow adjacent cells to communicate with each other [...by the flow of ions and other small molecular messengers]

Question 32

Identify

Answer 32

1: Apical Surface **l** 2: Lateral Surface 3: Basal Surface **l** 4: Blood Vessel 5: Epithelium **l** 6: Basal Lamina 7: Reticular Lamina **l** 8: Connective Tissue 9: Basement Membrane

Question 33

Identify

Answer 33

1: Tight Junctions 2: Membrane Protein **l** 3: Plasma Membrane 4: Adhering Junctions **l** 5: Microfilament 6: Intercellular Space 7: Adjacent Plasma Membranes 8: Desmosomes **l** 9: Protein Filaments 10: Protein Plaque **l** 11: Intermediat Filaments 12: Plasma Membrane **l** 13: Intercellular Space 14: Gap Junctions **l** 15: Pore **l** 16: Connexon