Epithelial Tissue

Question 1

Describe tight junctions

Answer 1

impermeable; acts as a barrier on the apical surface of the cell; decreases permeability occludins and claudins

Question 2

Describe gap junctions

Answer 2

communicating junctions fluid filled and connect the cells in order to communicate connexin aggregates

Question 3

What are the 3 types of anchoring junctions?

Answer 3

1. adherens 2. Desmosomes 3. Hemidesmosomes

Question 4

Describe adherens

Answer 4

lateral adhesions: cadherins+actin

Question 5

Describe desmosomes

Answer 5

lateral adhesions; cadherins+ intermediate filaments

Question 6

Describe hemidesmosomes

Answer 6

basal adhesions: integrins and intermediate filaments that anchor to the basal lamina

Question 7

What is the clinical relevance off tight junctions?

Answer 7

Bacteria that causes food poisoning target the tight junctions that are present in the GI tract and decreases the fluid flow into the intestines helicopter pylori: causes gastric ulcers and binds to the TJs in the stomach

Question 8

Describe pemphigus vulgaris

Answer 8

Autoimmune disease in which there is an abnormal desmosome function decreases cell to cell adhesion and blisters of the oral mucosa

Question 9

Describe the basement membrane

Answer 9

Adjacent to the basal domain selective barrier

Question 10

What is surrounding the cell (dark magenta)

Answer 10

The basement membrane

Question 11

What are the three types of apical specializations of a cell?

Answer 11

Microvilli, stereocilia, and Cilia

Question 12

Describe microvilli

Answer 12

Cytoplasmic

Have an actin core

Absorption

Increase the surface area of the cell for increased absorption

Question 13

Describe stereocilia

Answer 13

Long microvilli, less mobile

actin core

increased surface area

ARE restricted to epididymis and hair cells of the inner ear

Question 14

Describe cilia

Answer 14

Long and highly motile

beat in a wave like fashion to propel substances

Question 15

Where is simple squamous located? What is the function?

Answer 15

Location: line blood vessels, serous membranes, alveoli, and loopof Henle in the kidney

Function: exchange, barrer, lubrication

Question 16

Describe simple cuboidal

1. Location
2. Function

Answer 16

1. Location: kidney, tubules, glands, and associated ducts, terminal branches, and covering of the ovary
2. Function: absorption, barrier, secretion

Question 17

Describe simple columnar

1. Location
2. Function

Answer 17

1. Location: auditory tubes, uterus, oviducts, stomach, GI, gallbladder
2. Function: absorption and secretion

Question 18

Describe pseudostratified columnar ciliated

1. Location
2. Function

Answer 18

1. Location: lining of the nasal caity, pharynx, trachea, bronchi
2. Function: absorption and secretion, debris and particle movement

Question 19

Describe urothelium

1. Location
2. Function

Answer 19

1. Location: urinary bladder, uterus, urethra
2. Function: barrier, distensible property

Question 20

Describe nonkeratinized stratified squamous

1. Location
2. Function

Answer 20

1. Location: oral cavity, portions of the pharynx, esophagus, anus, vagina, and cornea

Function: barrier and protection

Question 21

Describe keratinized stratified squamous

1. Location
2. Function

Answer 21

1. Location: epidermis
2. barrier and protection

Question 22

Describe stratified cuboidal

1. Location
2. Function

Answer 22

1. Location: sweat glands and ducts, ovarian follicles, salivary glands
2. Function: barrier and passageway

Question 23

Describe a serous membrane

Answer 23

epithelial tissue that lines the internal body cavities

forms a smooth transparent, two layered membrane that is lubricated by serum

mesothelium: simple squamous that comprises a part of the serous membrane

Question 24

Describe compound glands and differentiate between

1. compound tubular
2. compound acinar
3. compound tubuloacinar

Answer 24

Question 25

What is labeled as E? (the blue guys)

Answer 25

simple squamous cells

Question 26

What is labeled as BM? What cells are shown next to it?

Answer 26

Basement membrane Simple cuboidal

Question 27

What cells are pictured?

Answer 27

Simple columnar

Question 28

What cells are pictured?

Answer 28

psuedostratified columnar ciliated

Question 29

What cells are pictured?

Answer 29

Simple columnar

Question 30

What cells are pictured?

Answer 30

Pseudostratified columnar ciliated

Question 31

What cells are pictured?

Answer 31

Urothelium

Question 32

What cells are pictured?

Answer 32

Nonkeratinized stratified squamous

Question 33

What cells are pictured?

Answer 33

Keratinized stratified squamous

Question 34

What cells are pictured?

Answer 34

Stratified cuboidal

Question 35

What is pictured?

Answer 35

serous acini

Question 36

What is pictured?

Answer 36

Mucous acini

Question 37

What is pictured?

Answer 37

Mucoserous acini

Question 38

What is pictured? what are the dots pointing to?

Answer 38

parotid gland, serous acini

Question 39

What gland is pictured?

Answer 39

sublingual