Epithelial Tissue

Question 1

a layer of cells that cover a surface

Answer 1

epithelia

Question 2

Functions of epithelia

Answer 2

1. covering and lining a surface (skin) - barrier
2. regulation of materials and sensory information (absorption, secretion, sensation, lubrication)
3. contractility ( sweat and mammary glands)
4. protection from external environment

Question 3

epithelia cell that is flat, very thin in cross section

Answer 3

squamous

Question 4

epithelia that appear square in cross section

Answer 4

cuboidal

Question 5

epithelia that appear rectangular, tall, long in cross section

Answer 5

columnar

Question 6

in reality, the cells are really ______ in 3D

Answer 6

polyhedral

Question 7

epithelia consisting of one layer of cells

Answer 7

simple

Question 8

location of simple squamous

Answer 8

air sac of lungs, blood vessels

Question 9

location of simple cuboidal

Answer 9

kidney tubules

Question 10

location of simple columnar

Answer 10

small intestine- jejunum

Question 11

epithelia consisting of more than one layer of cells

Answer 11

stratified

Question 12

location of keratinized stratified squamous epithelium

Answer 12

skin

Question 13

location of non keratinized stratified squamous epithelium

Answer 13

mouth, vagina

Question 14

location of stratified columnar epithelium

Answer 14

rare- male urethra

Question 15

location of stratified cuboidal epithelium

Answer 15

rare- sweat glands

Question 16

location of transitional epithelium

Answer 16

bladder

Question 17

location of pseudo stratified epithelium

Answer 17

respiratory tract, trachea

Question 18

found wherever an epithelium contacts connective tissue, consists of granular layer of thin fibrils that is composed of collagen, glycoprotein called proteoglycans

Answer 18

basal lamina

Question 19

basal lamina consists of three parts

Answer 19

1. lamina densa
2. lamina rara
3. lamina reticularis

Question 20

a fibrous , darkly staining layer into which fibers from hemidesmosomes, as well as adjacent extracellular matrix, insert
- part of basal lamina

Answer 20

lamina densa

Question 21

the lamina densa is composed of type ___ collagen and _______

Answer 21

type IV

proteoglycans

Question 22

a clear non staining layer ( may be on one or both sides of the lamina densa )

• part of basal lamina
• contains glycoprotein and laminin

Answer 22

lamina rara

Question 23

part of the basal lamina that is between the lamina dense and lamina rara and underlying tissue. Meshwork of reticular fibers

Answer 23

lamina reticularis

Question 24

like sticks to like

Answer 24

cohesion

Question 25

epithelia cells cohere to each other . in part due to binding action of surface molecules such as _________

Answer 25

glycoproteins

Question 26

______ is important in cohesion, and cells tend to disassociate with out it

Answer 26

calcium

Question 27

disk shaped structures on cells that foam adjacent electron dense areas seen in ultrastructural preps.

Answer 27

desmosomes (macula adherens)

Question 28

_____ ______ restricts direct passage of solids and fluids from outside of epithelia into regions between the epithelial cells

Answer 28

zonula occludens

Question 29

acts as anchoring point for terminal web of apical actin filaments found in tall columnar epithelial cells

Answer 29

zonula adherens

Question 30

autoimmune disease caused by antibodies damaging the desmoglein proteins in the maculae adherens (desmosomes)

Answer 30

pemphigus folaceus

Question 31

glands where secretion released into surrounding capillaries, no ducts.

Answer 31

endocrine

Question 32

glands where secretion usually released through dicts. secretory cells form a true epithelium

Answer 32

exocrine

Question 33

the change in the type of adult cells in a tissue to a form abnormal for that tissue

Answer 33

metaplasia

Question 34

smoking causes metaplasia where columnar turns into

Answer 34

squamous

Question 35

metaplasia where transitional turns into ____ due to a bladder stone

Answer 35

squamous

Question 36

type of exocrine secretion | product released by exocytosis from cell cytoplasm

Answer 36

merocrine

Question 37

type of exocrine secretion | whole cell is shed as secretion, sebaceous glands of skin

Answer 37

holocrine

Question 38

type of exocrine secretion | apical portion of cell is shed as secretion, like mammary gland, goblet cells

Answer 38

apocrine

Question 39

exocrine gland with no duct , individual secretory cells embedded in an epithelium that lines a structure (goblet cells )

Answer 39

unicellular gland

Question 40

gland that has a single, non branched duct | - the secretary components can be branched

Answer 40

simple gland

Question 41

type of exocrine gland where the duct is branched, ramified

Answer 41

compound

Question 42

type of exocrine gland where the secretory parts consist of tubes

Answer 42

tubular glands

Question 43

type of exocrine gland where the secretary portion consists of a coiled tube

Answer 43

coiled gland

Question 44

type of exocrine gland where the secretory part consist of bag like structures

Answer 44

acinar or alveolar gland

Question 45

type of exocrine gland where secretory parts consist of a combination of bags and tubes

Answer 45

tubuloacinar gland or | tubuloalveolar gland

Question 46

T/F: there are blood vessels in epithelium

Answer 46

false