Brainscape's Knowledge GenomeTM

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


See full index

A&P Ch1 > Epithelial Tissue > Flashcards

Epithelial Tissue Flashcards

1
Q

Epithelial Tissue

A

Covers exposed surfaces, lines internal passageways or forms glads.

May be derived from each of the three embryologic germ layers.

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

Characteristics

A
  • Cellularity
  • Polarity
  • Attachments
  • Avascularity
  • Regeneration
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Cellularity

A

Cells packaged tightly together.

  • Intercellular Cement
  • Cell Adhesions Molecules
  • Cell Junctions
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Intercellular Cement

A

Made from sticky proteoglycans containing glycosamines

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

Cell Adhesion Molecules (CAM’s)

A

Transmembraneous proteins that proceed through the cell membrane and can bind to CAM’s from other cells or to the basal lamina.

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

Cell Junctions

A

Specialized areas to bound or interlocking membranes.

  • Tight Junctions
  • Gap Junctions
  • Desmosomes
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Tight Junctions

A

Band of transmembrane proteins which produce a waterproof barrier.

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

Gap Junctions

A

Allow substances like ions to freely flow from one cell to another.

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

Desmosomes

A

Patches of plaques reinforced by intermediate filaments .

They are found in areas subject to much mechanical stress.

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

Polarity

A

There is an apical portion on top and a base below (above loose CT)

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

Attachments

A

Hemidesmosomes attach epithelia to basement membrane

From epithelia secretions from above lamina lucida and lamina densa from CT secretions from below

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

Avascularity

A

Derive nutrients from absorption through basement membrane

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

Regeneration

A

Often subject to mechanical stress, damage and cell loss

Stem cells (also known as germinative cells) are often located near the basement membrane.

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

Function

A
  • Physical Barrier
  • Selective Permeability
  • Provide Sensation
  • Specialized Secretion
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Physical Barrier

A

Serves as lining or covering to server as barrier

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

Selective Permeability

A

Substances must pass through cell membrane to enter.

17
Q

Provide Sensation

A

Sensory supply to alert the body as to both internal and external environment.

Neuroepithelia (Highly specialized receptors for a particular sensory function taste, smell, equilibrium & hearing)

18
Q

Specialized Secretions

A

All the glandular tissues of our body consist of epithelial tissue.

  • Endocrine
  • Exocrine
19
Q

Endocrine

A

Glands which secrete hormones out basal surface into interstitial fluids.

20
Q

Exocrine

A

Glands in which secretions are from apical surface into ducts which exit the body.

Can be serous(liquidly) as with enzyme releasing glands and/or mucous to protect the GI tract.

21
Q

Merocrine

A

Exocytosis (mucous glands of digestive tract) and is perhaps the most common exocrine gland.

22
Q

Apocrine

A

Apical surface of cell is shed along with secretory vesicles and cytoplasm

  • Cell must then repair itself.
  • Milk production is lactating breast cells and some sweat glands in the groin & armpit.
23
Q

Halocrine

A

Glands become packed with secretory vesicles and then burst releasing all he contents and destroying the cell (sebaceous glands)

24
Q

Classifications

A
  • Simple Squamous
  • Simple Cuboidal
  • Simple Columnar
  • Ciliated Columnar
  • Pseudostratified Ciliated Columnar
  • Transitional Epithelia
  • Stratified Squamous
  • Stratified cuboidal
25
Q

Simple Squamous

A

Single layer of thin flat cells

  • Respiration- linning lung alveoli for gas exchange
  • Reduce Friction- Slippery surface of mesothelium & blood vessels
26
Q

Simple Cuboidal

A

Allows for secretion & absorption of renal tubules (altering filtrate)

27
Q

Simple Columnar

A

Seen in digestive tract providing enzymes secretion & absorption

28
Q

Ciliated Simple Columnar

A

Creating a fluid curent in the uterine tube

29
Q

Pseudo stratified Cilitated Columnar

A

In upper respiratory tract to remove debris

30
Q

Transitional Epithelia

A

Many layers of cells which change shape urinary bladder

31
Q

Stratified Squamous

A

Consists of layers of squamous cells typically of linings which are exposed to mechanical stress such as the skin, mouth, rectum and vagina

Cells of these tissues are of ectodermal origin

32
Q

Stratified Cuboidal

A

Layers of cuboidal cells

example: Ducts od sweat & mammary glands

A&P Ch1 (5 decks)

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