EPITHELIAL TX LESSON 5

Question 1

Covers body surfaces, lin3s body cavities & constitute glands

Answer 1

Epithelium

Question 2

Composed almost entirely of cells forming a continuous sheet

Answer 2

Cellularity

Question 4

Containing no blood vessels

Answer 4

Avascular

Question 5

Supports nerve fibers

Answer 5

Innervated

Question 6

Epithelial cells are frequently damaged or lost to abrasion so they are replaced quickly

Answer 6

Regeneration

Question 7

Apical and basak surfaces

Answer 7

Polarity

Question 8

Protective function

Answer 8

Skin

Question 9

Secretory function

Answer 9

Glands

Question 10

Absorptive function

Answer 10

GIT

Question 11

Sensory function

Answer 11

Tongue and nose

Question 12

Contractile function

Answer 12

Muscles

Question 13

Excretory function and maintains e balance

Answer 13

Kidney

Question 14

Germ cell production

Answer 14

Testes

Question 15

Epidermis and it’s derivatives (hair, nails, sweat gl, sebaceous gk and mammary gland)

Answer 15

Surface ectoderm

Question 17

Epith lining the lower urinary tract from the kidneys to the urethra

Answer 17

Transitional epithelium

Question 18

Simple squamous epith lining the vascular system

Answer 18

Endothelium

Question 19

Simple squamous epith lining closed cavities of the body

Answer 19

Mesothelium

Question 20

Directed towards the external surface or the lumen of an enclosed cavity or tube

Answer 20

Apical / free domain

Question 21

Appears layered through not all of the cells rest in the BM

Answer 21

Pseudostratified Epithelium

Question 22

Directed

Question 23

Cytoplasmic processes that extend from the cell surface

Answer 23

Microvilli

Question 24

Microvilli of unusual length & are immotile

Answer 24

Stereocilia

Question 25

Motike cytoplasmic structures capable of moving fluid and particles along epithelial surfaces

Answer 25

Cilia (kinocilia)

Question 26

Much longer than cilia - In the spermatozoa of humans having 1 flagellum/ tail - it propels the cell along the female genital tract

Answer 26

Flagella

Question 27

Communicates w/ adjacent cells and characterized by specialized attachment areas or cell to cell adhesions through junction

Answer 27

Lateral domain

Question 28

A specialized attachment site on a cell that allowz for support and communication

Answer 28

Cell junction

Question 29

Directed towards the external surface or the lumen of an enclosed cavity or tube

Answer 29

APICAL/ FREEE domain

Question 30

8 major functions of epithelial tissue

Answer 30

1. Protection 2. Sensation 3. secretion 4. Excretion 5. Diffusion 6. Absorption 7. Contractility 8. Transportation

Question 31

Occluding junctions

Answer 31

Zonula occludens Tight jx

Question 33

Anchoring jxns

Answer 33

Zonula adherens Adhering jxns

Question 34

Communicating jxns

Answer 34

Gap jxns

Question 35

Desmosomes

Answer 35

Anchoring jxns

Question 36

Rests on the basal lamina anchoring the cell to underlying connextive tissue

Answer 36

BASAL domain

Question 37

No cells but it is a network of a protein fibwrs that connects adjacent epithelial cells

Answer 37

Basement membrane

Question 38

Reminder: EP TX: RENEWAL AND REPAIR

Answer 38

-Ep cells may only survive for a day or two because they are lost and destroyed. -replaced by continuous division of unspecialized cells called stem cells - stem cells are found in deepest layer next to BM

Question 39

4 cCHON structures of BM

Answer 39

Collagen Lamines Entactin Proteoglycans

Question 40

BM functions

Answer 40

Structural attachment Compartmentalization Filtration Tissu3 scaffolding Regulation and signaling

Question 41

Structural attachment

Answer 41

Anchors epith cells

Question 42

Compartmentalization

Answer 42

Isolates CT fromt the epith, nerve and muscle cells

Question 43

Tissue scaffolding

Answer 43

Guide or raised platform for tissue regeneration

Question 44

Regulation and signaling

Answer 44

Interaction w cell surface receptors

Question 45

Organized to form the functional component of organs called GLANDS that produce substances that are needed by the body

Answer 45

Glandular epithelium

Question 46

Secrete their products onto a surface thru epithelial ducts/tubes connexted to a surface

Answer 46

EXOCRINE GLANDS

Question 47

Here, vesicles fuse w the plasma membrane & extrude their contents by exocytosis - produxt oozes out of the cell

Answer 47

Merocrine

Question 48

Part of cell pinches off

Answer 48

Apocrine secretion

Question 49

Bursts open and dies releasing secretion

Answer 49

Holocrine secretion

Question 50

Secretory product is released in the apical portion of the cell - lactating mammary glad -skin -eyelid -ear

Answer 50

Apocrine

Question 51

Secretory product accumulates w in the maturing cell w undergoes programmed cell death -sebaceous gl of skin -meibomian gl of eyelid

Answer 51

Holocrine

Question 52

Mucoid secretions -viscous, slimy Ex: salivary gl and stomach

Answer 52

Mucous gland

Question 53

Watery secretions Ex. Parotid gl and pancreas

Answer 53

Serous gland

Question 54

Lack a duct Secret their products into the CT

Answer 54

Endocrine glands

Question 55

Consists of single cells distributed among non secratory cells Ex. Goblet cell w columnar cells of intestine

Answer 55

Unicellular gland

Question 56

Consist of >1 cell Ex. Goblet cells w columnar cells of stomach

Answer 56

Multicellular gland

Question 57

Classification of ducts

Answer 57

Simple Compound

Question 58

Shape of ducts

Answer 58

Tubular Alveolar Tubualveolar

Question 59

Simple Compound Tubular Alveolar Tubualveolar

Answer 59

Unbranched duct Branched duct Tube like Flask shape Sac like dilatation