ch. 1 2 3 4 Flashcards Preview

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Flashcards in ch. 1 2 3 4 Deck (134)
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31

lack of blood vessels

avascular

32

cells are continually replaced via divisions of stem cells in the epith

regeneration

33

physical protection of covered surfaces
control permeability
provide sensation
produce specialized secretions

4 functions of epith

34

in many epith that line internal passageways

microvilli

35

funx: increase surface area for increase absorption and secretion

microvilli

36

where would microvilli be found

small intestine

37

funx: sweep substances along epith surface

cilia

38

where would cilia be found

lines trachea

39

epith cells are firmly attached to one another and to the basement membrane

cell junctions

40

3 types of cell junctions

tight, gap, desmosomes

41

prevent diffusion of fluids and solutes between cells

tight junctions

42

permit free diffusion of ions and small molecules between cells for cells to coordinate with each other

gap junction

43

very strong and resist stretching and twisting; anchor cells to each other and to the basement membrane

desmosomes

44

3 types of cell shapes in epith

squamous
cubodial
columnar

45

found in regions where secretion or absorption occurs; decreases time needed for materials to cross epith

simple epith

46

generally found in areas that need protection

stratified epith

47

most delicate epith

simple squamous epith

48

very protective

stratified squamous epith

49

unique in that it transitions from thick to thin and back again as it stretches and recoils

transitional epith

50

possess cilia

pseudostratified columnar epith

51

6 types of epith

simple squamous epith
stratified squamous epith
simple cubodial epith
transitional epith
simple columnar epith
pseudostratified columnar epith

52

lines body cavities enclosing heart, lungs, and guts

mesothelium

53

lines inner surface of heart and all blood vessels

endothelium

54

contains keratin- a tough and waterproofing protein

keratinized

55

ex of keratinized

skins surface

56

ex of nonkeratinized

esophagus, vagina

57

what is unique about transitional epith

transitions from thick to thin and back again as it stretches and recoils

58

ex of transitional epith

urinary bladder

59

collections of glanular epith

glands

60

secrete hormones directly into interstitial fluid and/or blood

endocrine