Day 2 epithelial tissue

Question 1

many simillar cells working together form what?

Answer 1

A tissue

Question 2

What are the functions of epithelial tissue? (4)

Answer 2

physical protection

controls permeability

provides sensation

secretions

Question 3

typically epithelial tissue is found near what type of tissue?

Answer 3

connective tissue

Question 4

What are three characteristics of epithelial tissue?

Answer 4

cellularity- composed almost entirely of cells

Polarity- exposed [apical] and basal surface

Attachments- Basal layer to basement membrane adjacent cells

Question 5

this organelle is found in high concentration in muscle cells and lower levels in bone cells

Answer 5

mitochondria

Question 6

what is an example of an epithelial cell that shows polarity? think location and function

Answer 6

epithelium that lines most of the respiratory tract. The small bristly area are micro villi found on the exposed surface of mucus producing cells

Question 7

epithelial tissue is typically found in close proximity to connective tissue why is this?

Answer 7

because epithelial tissue is avascular

Question 8

what are the three shapes of epithelia?

Answer 8

squamous
cubodial
columnar

Question 9

what is the epithelial classification based on number of layers?

Answer 9

simple
stratified
pseudostratified
transitional epithelium

Question 10

Simple epithelia can be what?

Answer 10

squamous
cuboidal
columnar

Question 11

stratified epithelia can be what?

Answer 11

squamous

Maybe cuboidal sometimes

Question 12

where do you find simple squamous epithelium?

Answer 12

pleural pericarial and peritoneal body cavities; andothelia lining heart and blood vessels; alveoli of lungs

Question 13

what is the function of simple squamous epithelium?

Answer 13

reducess friction

controls vessel permiability

performs absorption and secretion

Question 14

where is stratified squamous epithelium found?

Answer 14

surface of skin

lining of oral cavity

throat

esophagus

rectum

anus

vagina

Question 15

what is the function of stratified squamous epithelium?

Answer 15

provides physical protection against abrasions, pathogens and chemical attacks

Question 16

where is simple cuboidal epithelium found?

Answer 16

glands ducts and kidney tubules

Question 17

what are the functions of simple cuboidal epithelium?

Answer 17

limited protection

secretion

absorption

Question 18

what is the location of stratified cuboidal epithelium?

Answer 18

lining of some ducts (rare)

Question 19

what is the function of stratified cuboidal epithelium?

Answer 19

protection secretion and absorption

Question 20

What is the location of simple columnar epithelium?

Answer 20

linings of stomach and intestines

Question 21

what is the function of simple columnar epithelium?

Answer 21

protection secretion and absorption

Question 22

what is the location of stratified columnar epithelium?

Answer 22

mammary glands and salivary glands

Question 23

what is the function of stratified columnar epithelium?

Answer 23

protection

Question 24

what is the location of psudostratified ciliated columnar epithelium?

Answer 24

lining of nasal cavity 
nasal cavity
trachea
bronchi
portions of male reproductive tract

Question 25

what is the function of psudostratified ciliated columnar epithelium?

Answer 25

protection and secretion

Question 26

What is unusual about psudostratified columnar epithelium?

Answer 26

looks like stratified but it is one layer thick

Question 27

What is the location of transitional epithelium?

Answer 27

urinary bladder; renal pelvis; ureters

Question 28

what is the function of transitional epithelium?

Answer 28

permits expansion and recoil after streching

Question 29

what are tight junctions also called?

Answer 29

occluding juctions

Question 30

what is the zonula adherens also called?

Answer 30

adhesion belt

Question 31

what are the button desmosomes also called?

Answer 31

macula adherens or desmosomes

Question 32

what are communication junctions also called?

Answer 32

gap junction

Question 33

what do tight junction do?

Answer 33

prevents movement of substances to underlying tissues or water-soluble materials in intercellular space ex epithelium of digestive wall

Question 34

zona adherens what is an example? what are the characterisitcs?

Answer 34

cams and proteoglycans form junctions with cytoskeleton filaments often at terminal web ex. superficial layer of skin

Question 35

where are Hemidesmosomes found?

Answer 35

they have a strong attachment to basal lamina found where there is a lot of sheering ex. esophagus

Question 36

gap junctions are used for what?

Answer 36

communicating junctions between cells; chemical and electrical coupling epithilial cells with cilia, neurons or cardiac muscle ex. produce synchronous activation of heart muscles