Epithelium

Question 1

lining of surfaces of the body cavities; glandular secretion

Answer 1

epithelial tissue

Question 2

where does the epithelium rest?

Answer 2

basal lamina

Question 3

a thin continuous supporting layer that separates the epithelial tissue from the underlying connective tissue

Answer 3

basal lamina

Question 4

what are the basal lamina composed of

Answer 4

type 4 collagen, laminin, and proteoglycans

Question 5

single layer of flattened cells usually joined by intercellular junctions and resting on basement membranes

Answer 5

simple squamous epithelium

Question 6

provides protection, forms conduits for gland ducts, and may be specialized for active secretion and absorption

Answer 6

simple cuboidal epithelium

Question 7

mainly found in sites engaged in protection of wet surfaces, nutrient absorption, and secretion

Answer 7

simple columnar epithelium

Question 8

poorly suited for absorption and secretion by virtue of their thickness; some are moderately permeable to water and other small molecules; two or more layers of cells

Answer 8

stratified epithelium

Question 9

can be seen in epidermis

Answer 9

stratified squamous keratinized

Question 10

widely distributed in the mouth, esophagus, larynx, vagina, and anal canal

Answer 10

stratified squamous non-keratinized

Question 11

widely distributed in the mouth, esophagus, larynx, vagina, and anal canal

Answer 11

stratified squamous non-keratinized

Question 12

examples includes sweat glands and developing ovarian follicles

Answer 12

stratified cuboidal

Question 13

example includes conjunctiva

Answer 13

stratified columnar

Question 14

found only in the urethelium with special features to make it waterproof and expansile

Answer 14

transitional epithelium

Question 15

hairlike organelles that are easily observed in light microscopy

Answer 15

cilia

Question 16

most important type of cilia

Answer 16

motile cilia

Question 17

what happens when there is a defective cilia?

Answer 17

kartagener syndrome

Question 18

extremely long microvili which is usually found in singly or small numbers

Answer 18

stereo cilia

Question 19

it increases the surface area for absorption by 30x

Answer 19

microvilli

Question 20

disorder of the small intestine in which one of the first pathologic changes is loss of the microvilli brush border of the absorptive cells

Answer 20

celiac disease

Question 21

celiac disease is triggered by what?

Answer 21

wheat, barley, and rye

Question 22

enumerate the histologic triad of celiac disease

Answer 22

appearance of intraepithelial lymphocytosis; inflammation, villous atrophy

Question 23

modified columnar epithelial cells that synthesize and secrete mucus

Answer 23

goblet cells

Question 24

ductless and release products called hormones directly into the bloodstream

Answer 24

endocrine glands

Question 25

connect to the surface by ducts which take the secretions to the surface or lumen

Answer 25

exocrine glands

Question 26

no destruction after secretion

Answer 26

merocrine

Question 27

it involves the cell filling with secretory products; total destruction

Answer 27

holocrine

Question 28

part of the cell is excreted out together with the secretory products of the cell; partial destruction

Answer 28

apocrine

Question 29

main protein components of tight junction

Answer 29

claudins, occludins, tricellulin

Question 30

site of tight junction

Answer 30

luminal end of lateral cell membrane

Question 31

main function of tight junction

Answer 31

control of paracellular diffusion; prevents exchange of intrinsic proteins

Question 32

main protein component of adhering belt

Answer 32

classic catherine, catenins

Question 33

site of adhering belt

Answer 33

lateral plasma membrane; immediately deep to tight junction

Question 34

main function of adhering belt

Answer 34

link cytoskeletons of adjacent cells to form strong cohesive epithelium

Question 35

main protein component of desmosome

Answer 35

cadherins

Question 36

site of desmosomes

Answer 36

lateral plasma membrane

Question 37

main function of desmosome

Answer 37

link cytoskeletons of adjacent cells to form strong cohesive epithelium

Question 38

main components of hemidesmosome

Answer 38

integrins, laminins of basement membrane

Question 39

site of hemidesmosome

Answer 39

basal plasma membrane

Question 40

main function of hemidesmosome

Answer 40

link cells to underlying basement membrane

Question 41

main components of gap junctions

Answer 41

connexins

Question 42

site of gap junctions

Answer 42

lateral plasma membrane

Question 43

main function of gap junctions

Answer 43

passage of ions and small molecules between cells; intercellular signaling