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Histology > EPITHELIAL TX LESSON 5 > Flashcards

EPITHELIAL TX LESSON 5 Flashcards

1
Q

Covers body surfaces, lin3s body cavities & constitute glands

A

Epithelium

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2
Q

Composed almost entirely of cells forming a continuous sheet

A

Cellularity

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4
Q

Containing no blood vessels

A

Avascular

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5
Q

Supports nerve fibers

A

Innervated

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6
Q

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

A

Regeneration

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7
Q

Apical and basak surfaces

A

Polarity

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8
Q

Protective function

A

Skin

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9
Q

Secretory function

A

Glands

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10
Q

Absorptive function

A

GIT

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11
Q

Sensory function

A

Tongue and nose

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12
Q

Contractile function

A

Muscles

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13
Q

Excretory function and maintains e balance

A

Kidney

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14
Q

Germ cell production

A

Testes

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15
Q

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

A

Surface ectoderm

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16
Q
A
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17
Q

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

A

Transitional epithelium

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18
Q

Simple squamous epith lining the vascular system

A

Endothelium

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19
Q

Simple squamous epith lining closed cavities of the body

A

Mesothelium

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20
Q

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

A

Apical / free domain

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21
Q

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

A

Pseudostratified Epithelium

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22
Q

Directed

A
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23
Q

Cytoplasmic processes that extend from the cell surface

A

Microvilli

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24
Q

Microvilli of unusual length & are immotile

A

Stereocilia

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25
Q

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

A

Cilia (kinocilia)

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26
Q

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

27
Q

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

A

Lateral domain

28
Q

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

A

Cell junction

29
Q

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

A

APICAL/ FREEE domain

30
Q

8 major functions of epithelial tissue

A
  1. Protection
  2. Sensation
  3. secretion
  4. Excretion
  5. Diffusion
  6. Absorption
  7. Contractility
  8. Transportation
31
Q

Occluding junctions

A

Zonula occludens
Tight jx

33
Q

Anchoring jxns

A

Zonula adherens
Adhering jxns

34
Q

Communicating jxns

35
Q

Desmosomes

A

Anchoring jxns

36
Q

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

A

BASAL domain

37
Q

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

A

Basement membrane

38
Q

Reminder: EP TX: RENEWAL AND REPAIR

A

-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

39
Q

4 cCHON structures of BM

A

Collagen
Lamines
Entactin
Proteoglycans

40
Q

BM functions

A

Structural attachment
Compartmentalization
Filtration
Tissu3 scaffolding
Regulation and signaling

41
Q

Structural attachment

A

Anchors epith cells

42
Q

Compartmentalization

A

Isolates CT fromt the epith, nerve and muscle cells

43
Q

Tissue scaffolding

A

Guide or raised platform for tissue regeneration

44
Q

Regulation and signaling

A

Interaction w cell surface receptors

45
Q

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

A

Glandular epithelium

46
Q

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

A

EXOCRINE GLANDS

47
Q

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

48
Q

Part of cell pinches off

A

Apocrine secretion

49
Q

Bursts open and dies releasing secretion

A

Holocrine secretion

50
Q

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

51
Q

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

52
Q

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

A

Mucous gland

53
Q

Watery secretions
Ex. Parotid gl and pancreas

A

Serous gland

54
Q

Lack a duct
Secret their products into the CT

A

Endocrine glands

55
Q

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

A

Unicellular gland

56
Q

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

A

Multicellular gland

57
Q

Classification of ducts

A

Simple
Compound

58
Q

Shape of ducts

A

Tubular
Alveolar
Tubualveolar

59
Q

Simple
Compound
Tubular
Alveolar
Tubualveolar

A

Unbranched duct
Branched duct
Tube like
Flask shape
Sac like dilatation

Histology (6 decks)

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