Chapter 4 — Epithelia

Question 1

6 functions of epithelial tissue

Answer 1

protection
absorption
excretion
filtration
secretion
reception

Question 2

example of epithelial tissue’s protection function

Answer 2

skin (epidermis) - protects from pathogens, microbes, etc getting into body

Question 3

example of epithelial tissue’s absorption function

Answer 3

digestive tract, lined with epithelia specialized to absorb nutrients & water

Question 4

example of epithelial tissue’s excretion function

Answer 4

urinary system - tissue in kidneys removes material from blood

Question 5

example of epithelial tissue’s filtration function

Answer 5

capillaries - holes in walls filter materials in and out - exhange between vascular compartment and interstitial compartment

Question 6

example of epithelial tissue’s secretion function

Answer 6

glands - ex. sweat glands

Question 7

example of epithelial tissue’s reception function

Answer 7

sensory receptors in epithelial cells synapse with sensory neurons

Question 8

2 criteria by which epithelia is classified

Answer 8

number of cell layers

shape of cells

Question 9

_____ epithelia has one layer of cells; _______ has more than 1 layer

Answer 9

simple; stratified

Question 10

3 cell shapes

Answer 10

sqamous - flat
cuboidal - cube shaped
columnar - rectancular, tall

Question 11

a tissue with tall cells and multiple layers would be called…

Answer 11

stratified columnar epithelia

Question 12

a tissue with tall, ciliated cells and multiple layers would be called…

Answer 12

stratified ciliated columnar epithelia

Question 13

a tissue with tall, ciliated cells and multiple layers - some of which are not ciliated - would be called…

Answer 13

pseudostratified ciliated columnar epithelia

Question 14

fingerlike extensions of the membrane on some cells

Answer 14

cilia/microvilli

Question 15

epithelial tissue displays ______, there being an obvious top and bottom

Answer 15

polarity

Question 16

the ‘top’ of an epithelial cell

Answer 16

apical aspect

Question 17

the ‘bottom’ of an epithelial cell

Answer 17

basal aspect

Question 18

the ‘sides’ of an epithelial cell

Answer 18

lateral aspect

Question 19

specialized connective tissue between the basal aspect and the tissue it attaches to

Answer 19

basement membrane

Question 20

epithelia has _____ cellularity

Answer 20

high

Question 21

‘without blood vessels’

Answer 21

avascular

Question 22

epithelial cells don’t need vascularity to get the materials they need due to their ________ - they take materials from…

Answer 22

thinness; the tissue they’re attached to

Question 23

despite its avascularity, epithelia still heals easily because of its _______

Answer 23

thinness

Question 24

epithelial tissue forms ______, which play a role in secretion

Answer 24

glands

Question 25

two types of glands

Answer 25

endocrine | exocrine

Question 26

describe endocrine glands

Answer 26

secrete hormones - no duct - secrete into interstitial fluid

Question 27

describe exocrine glands

Answer 27

secrete other substances - have a duct - secrete onto a surface

Question 28

example of an endocrine gland

Answer 28

adrenal gland - secretes adrenaline

Question 29

example of an exocrine gland

Answer 29

sebaceous glands - secrete oil onto skin

Question 30

example of simple squamous epithelia

Answer 30

pleura lining lungs

Question 31

example of stratified squamous epithelia

Answer 31

vagina cells

Question 32

example of simple cuboidal epithelia

Answer 32

kidney cells

Question 33

example of stratified cuboidal epithelia

Answer 33

sweat gland duct cells

Question 34

example of simple columnar epithelia

Answer 34

pancreatic cells

Question 35

example of stratified columnar epithelia

Answer 35

salivary gland duct cells