Epithelial Tissue

Question 1

afferent

Answer 1

towards

Question 2

efferent

Answer 2

away

Question 3

acidophilic

Answer 3

structures that stain with acid such as eosin (aka eosinophilic)

Question 4

basophilic

Answer 4

structures that stain with basic dyes such as hematoxylin

Question 5

Periodic acid-schiff (PAS)

Answer 5

stains polysaccharides

Question 6

Immunofluorescence imaging

Answer 6

Decorate component with an antibody that has a fluorescent label to it

Question 7

endothelium

Answer 7

simple squamous epithelium lining of blood vessels

Question 8

mesothelium

Answer 8

outside wall of organs

Question 9

Where does epithelial tissue get its nutrients from?

Answer 9

Epithelial tissue is AVASCULAR, and gets its nutrients from connective tissue

Question 10

apical

Answer 10

side facing exterior surface (lumen or outside)

Question 11

basal

Answer 11

facing basal lamina, anchoring cell to connective tissue

Question 12

microvilli

Answer 12

apical projections that increase surface area of the cell

actin filaments

located in gut and kidney

Question 13

cilia

Answer 13

important for cell movement

microtubule (tubulin) filaments that come from special organizing centers known as basal bodies

organization known as 9+2

Question 14

Zonula occludens (tight junctions)

Answer 14

prevents the lateral movement between cells and prevents the mixing of apical and plasma membrane lipids and proteins

SELECTIVE passage of substances

*ONLY FOUND IN EPITHELIUM

Question 15

zonula adherens (cadherans)

Answer 15

connects actin filament bundle in one cell to the next

calcium mediated

Question 16

macula adherans (desmosome)

Answer 16

interact with intermediate filaments to form desmosome - majoring anchoring cell to cell junction used to withstand mechanical stress

have adhesion molecules called desmogleins

Question 17

gap junction

Answer 17

direct passage of signaling molecules from one cell to another

Question 18

basement membrane

Answer 18

composed of basal lamina and reticular lamina

Question 19

basal lamina

Answer 19

lamina lucida
lamina densa

Type IV Collagen
laminin
Proteoglycans

Question 20

reticular lamina

Answer 20

reticular fibers (Type III Colagen)

Question 21

serosa

Answer 21

mesothelium plus underlining connective tissue

Question 22

transitional epithelium

Answer 22

dome shaped epithelial cells facing the lumen

only found in bladder and ureters

allows for expansion

Question 23

basal bodies

Answer 23

where microtubules grow out of

Question 24

stereocilia

Answer 24

elongated microvilli

Question 25

hemidesmosome

Answer 25

integrin links cell to basal lamina tight anchoring to the underlying connective tissue via the basement membrane made of intermediate filaments

Question 26

crypts

Answer 26

little crevices going into connective tissue region (protected) where stem cells are kept to regenerate

Question 27

merocrine

Answer 27

normal exocytosis

Question 28

apocrine

Answer 28

a material (like a lipid product) is released from cytoplasm to extracellular space by taking plasma membrane with it

Question 29

holocrine

Answer 29

cells rupture and entire cytoplasmic material is released

Question 30

serous secretion

Answer 30

watery, non-glycosylated proteins HE stain round nuclei

Question 31

mucus secretion

Answer 31

highly glycosylated (sugars) proteins PAS stain flat nuclei

Question 32

epithelial dyspolasia

Answer 32

abnormality in maturation of cells within a tissue

Question 33

adenoma

Answer 33

a benign epithelial tumor having a glandular origin and structure

Question 34

adenocarcinoma

Answer 34

malignant tumor originating in glandular epithelium

Question 35

closely apposed

Answer 35

cells close to each other

Question 36

selective barrier

Answer 36

epithelial cells form a selective barrier between underlying connective tissue and the outside environment facilitates or inhibits the passing of certain materials

Question 37

Is epithelial tissue vascular?

Answer 37

No! epithelial tissue is AVASCULAR!

Question 38

where are stereocilia located?

Answer 38

inner ear male reproductive system

Question 39

primary cilia

Answer 39

present in almost all cells function as sensory antennae

Question 40

motile cilia

Answer 40

most commonly found in epithelial cells function in transporting secretions, proteins and foreign bodies also present on sperm cells

Question 41

terminal web

Answer 41

where actin filaments anchor in microvilli

Question 42

what are occluding (tight) junctions composed of

Answer 42

proteins: occludins, claudins, JAM (junction adhesion molecules)

Question 43

heterotypic binding

Answer 43

when binding occurs between different types of CAM

Question 44

homotypic binding

Answer 44

when binding occurs between same type of CAM

Question 45

what are zonula adherens composed of?

Answer 45

cadherins and actin