Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Histology > Epithelium > Flashcards

Epithelium Flashcards

1
Q

Types of tissues

A

Epithelial
Muscular
Connective
Nervous tissue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

2 types of epithelial tissues

A 
Lining epithelial cells
Glandular epithelia (make up most of the glands in the body)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Examples of epithelial tissues

A

o The outer layer of the skin .
o The inner surface of the digestive and respiratory cavities.
o The inner surface of the heart and blood vessels.
o The walls and the organs of the closed ventral body cavities.
o The ducts of the exocrine glands.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

In epithelial cells the cell to cell contact is at …. but the extracellular material is at……

A

Maximum

Minimum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Each epithelial cell is supported by

A

A basment membrane called basal lamella

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Epithelial cells according to blood vessels

A

Avascular (have no blood cells)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Epithelial cells are derived from

A

Embryonic germ layers including endoderm, mesoderm and ectoderm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Apical surface

A

free surface exposed at the body surface or at the lumen (space) of the body cavity, duct, tube or vessel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Basal surface of epithelium rests on

A

Basement membrane

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Basement membrane (basal lamella)

A

non- living adhesive material secreted by the epithelium and the underlying connective tissue .

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Why is the epithelial tissues attached to basement membrane attached to connective tissues

A

Because it’s avascular and needs blood supply from connective tissues

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Epithelial cells are often characterized by frequent cell division why?

A

because they are exposed to wear and tear and injury, necessitating replacement.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What epithelial cell doesn’t have a basement membrane, apical surface nor wear and tear

A

Endocrine glands

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Polarity is in most of epithelial cells. What is it

A

structural and functional asymmetry

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

In simple epithelia name the 3 surfaces

A

Apical (free)
Lateral (between each cell and the other)
Basal (attached to the basal lamina)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Apical / surface modification

A

Microvilli
Stereocilia
Cilia and flagella

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Microvilli

A

irregular, fingerlike projections with an extracellular glycoprotein layer (cell at) . Can be seen under LM

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Microvilli contain a core of … and is attached to

A

Actin filaments

Terminal web

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Stereocilia and where it’s usually found

A

Long motile microvilli found in places with absorptive or sensory function

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Stereocilia eg

A

In epididymis, ductus deferens, (hair cells of maculae and corti ) in internal eat

21
Q

Cilia

A

elongated, highly motile structures on the surface of some epithelial cells

22
Q

Cilia is much longer and ….times wider than a microvillus

A

2

23
Q

A ciliated cell of the tracheaقصبة هوائية٠ lining is estimated to have about .. cilia

A

250

24
Q

Flagella is only found in

A

Spermatozoa

25
Q

Flagella and cilia are different in

A

Flagella are much longer and are normally limited to one flagellum per cell

26
Q

Cilia and flagella are made of

A

Axoneme

27
Q

Axoneme

A

9 doubles and 1 double of microtubules in the middle similar to centrioles

28
Q

At the base of cilia or flagell there is a

A

Basal body similar to centrioles in structure (9packs of 3)

29
Q

Brush / striated border mocrovilli

A

microvilli-covered surface of simple epithelium

30
Q

Cores of brush borders are made of ….

A

Parallel actin micro filaments

31
Q

Terminal web

A

a filamentous structure found at the apical surface of epithelial cells that possess microvilli.

32
Q

The micro filaments can contract and shorten by

A

Interacting with cytoplasmic myosin

33
Q

Microvilli usually cover

A

Apical surfaces of absorptive cells to increase their apical surface area when extended

34
Q

Where brush border is example

A

absorptive simple columnar epithelium lining the small intestines and the absorptive simple cuboidal epithelium lining the proximal tubules of the kidney.

35
Q

Cell junctions are usually in

A

Lateral membranes

36
Q

If the junction extends around the entire cell perimeter it is called

A

Zonula

37
Q

If the junction presents as strip shaped or band-shaped it is called

A

Fascia

38
Q

If the junction presents as small circular or spot like it is called

A

Macula

39
Q

Brush / striated border mocrovilli

A

microvilli-covered surface of simple epithelium

40
Q

Cores of brush borders are made of ….

A

Parallel actin micro filaments

41
Q

Terminal web

A

a filamentous structure found at the apical surface of epithelial cells that possess microvilli.

42
Q

The micro filaments can contract and shorten by

A

Interacting with cytoplasmic myosin

43
Q

Microvilli usually cover

A

Apical surfaces of absorptive cells to increase their apical surface area when extended

44
Q

Where brush border is example

A

absorptive simple columnar epithelium lining the small intestines and the absorptive simple cuboidal epithelium lining the proximal tubules of the kidney.

45
Q

Cell junctions are usually in

A

Lateral membranes

46
Q

If the junction extends around the entire cell perimeter it is called

A

Zonula

47
Q

If the junction presents as strip shaped or band-shaped it is called

A

Fascia

48
Q

If the junction presents as small circular or spot like it is called

A

Macula

Histology (4 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions