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Histology Exam 1 > Epithelial Tissue > Flashcards

Epithelial Tissue Flashcards

1
Q

a layer of cells that cover a surface

A

epithelia

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2
Q

Functions of epithelia

A
  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
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3
Q

epithelia cell that is flat, very thin in cross section

A

squamous

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4
Q

epithelia that appear square in cross section

A

cuboidal

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5
Q

epithelia that appear rectangular, tall, long in cross section

A

columnar

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6
Q

in reality, the cells are really ______ in 3D

A

polyhedral

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7
Q

epithelia consisting of one layer of cells

A

simple

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8
Q

location of simple squamous

A

air sac of lungs, blood vessels

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9
Q

location of simple cuboidal

A

kidney tubules

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10
Q

location of simple columnar

A

small intestine- jejunum

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11
Q

epithelia consisting of more than one layer of cells

A

stratified

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12
Q

location of keratinized stratified squamous epithelium

A

skin

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13
Q

location of non keratinized stratified squamous epithelium

A

mouth, vagina

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14
Q

location of stratified columnar epithelium

A

rare- male urethra

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15
Q

location of stratified cuboidal epithelium

A

rare- sweat glands

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16
Q

location of transitional epithelium

A

bladder

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17
Q

location of pseudo stratified epithelium

A

respiratory tract, trachea

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18
Q

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

A

basal lamina

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19
Q

basal lamina consists of three parts

A
  1. lamina densa
  2. lamina rara
  3. lamina reticularis
20
Q

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

A

lamina densa

21
Q

the lamina densa is composed of type ___ collagen and _______

A

type IV

proteoglycans

22
Q

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

  • part of basal lamina
  • contains glycoprotein and laminin
A

lamina rara

23
Q

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

A

lamina reticularis

24
Q

like sticks to like

A

cohesion

25
Q

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

A

glycoproteins

26
Q

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

A

calcium

27
Q

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

A

desmosomes (macula adherens)

28
Q

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

A

zonula occludens

29
Q

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

A

zonula adherens

30
Q

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

A

pemphigus folaceus

31
Q

glands where secretion released into surrounding capillaries, no ducts.

A

endocrine

32
Q

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

A

exocrine

33
Q

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

A

metaplasia

34
Q

smoking causes metaplasia where columnar turns into

A

squamous

35
Q

metaplasia where transitional turns into ____ due to a bladder stone

A

squamous

36
Q

type of exocrine secretion

product released by exocytosis from cell cytoplasm

A

merocrine

37
Q

type of exocrine secretion

whole cell is shed as secretion, sebaceous glands of skin

A

holocrine

38
Q

type of exocrine secretion

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

A

apocrine

39
Q

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

A

unicellular gland

40
Q

gland that has a single, non branched duct

- the secretary components can be branched

A

simple gland

41
Q

type of exocrine gland where the duct is branched, ramified

A

compound

42
Q

type of exocrine gland where the secretory parts consist of tubes

A

tubular glands

43
Q

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

A

coiled gland

44
Q

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

A

acinar or alveolar gland

45
Q

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

A

tubuloacinar gland or

tubuloalveolar gland

46
Q

T/F: there are blood vessels in epithelium

A

false

Histology Exam 1 (8 decks)

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