Brainscape's Knowledge GenomeTM

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


See full index

Bree - Structures > Lecture 5 - Epithelial Tissue > Flashcards

Lecture 5 - Epithelial Tissue Flashcards

1
Q

where are epithelial tissue derived from

A

all three germ layers

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

where is the epidermis derived from

A

ectoderm

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

where is the lining of the GI tract and respiratory tract derived from

A

the endoderm

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

where is the endothelium and mesothelium derived from

A

the mesoderm

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

endothelium definition

A

lining of blood vessels, derived from mesoderm

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

mesothelium definition

A

lining of pericardial and thoracic cavities, derived from mesoderm

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

two types of epithelial tissue

A

membranous epithelia

glandular epithelia

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

membranous epithelia

A

sheetlike tissues that cover or line surfaces, cavities and organs of the body

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

glandular epithelia

A

perform secretory functions

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

what do epithelial tissues cover

A

tubes (digestive and cardio tracts), cavities (thoracic), and all body surfaces (skin)

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

functions of epithelial tissue (5)

A 
protection and containment (skin)
absorption (intestines)
secretion (glands)
sensation (neuroepithelium) 
contractility (myoepithelium)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

characteristic of epithelial tissue

A
  1. cells closely bound together by membrane specializations (junctions), form continuous sheets
  2. supported by basement membrane (seperated from underlying supporting tissue)
  3. Not penetrated by blood vessels (avascular)
  4. Polar
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

simple epithelial tissue

A 
on a surface or facing a lumen 
single layer 
places where diffusion, absorption, or secretion occur 
squamous, cuboidal, or columnar 
have cilia or microvilli
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

simple squamous

A 
flat cells (scales)
diffusion of fluids or gas (very thin)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

location of simple squamous

A

lungs, blood and lymphatic vessels, cavities (pleural, peritoneal, pericardial)

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

simple cuboidal

A

as tall as they are wide with prominent nucleus

excretion, secretion, absorption

17
Q

location of simple cuboidal

A

ducts of kidney, thyroid gland, salivary gland

18
Q

simple columnar

A 
cells taller, eliptical nucleus located basally 
function in absorption
19
Q

location of simple columnar

A

intestines

20
Q

simple columnar ciliated

A

cilia at apical surface
propel ovum over cell surface to uterus
in the oviduct and respiratory tract

21
Q

pseudostratified columnar ciliated

A

nuclei at different positions but only one real layer
propel mucuous and entrapped particles
in trachea
Sometimes lymphocytes will have infiltrated

22
Q

stratified

A

two or more layers
protective function
classification is based on shape of cell at surface

23
Q

stratified squamous

A

top layer flattened
withstand chronic abrasion
in oral cavity, esophagus, cervix, vagina

24
Q

stratified squamous keratinized

A

surface layer of keratin, withstand chronic abrasion, epithelial surface of skin (epidermis)

25
Q

stratified cuboidal

A

1-2 layers of cuboidal
provide thicker lining
larger excretory ducts of exocrine glands (ex: salivary glands)

26
Q

transitional epithelium

A

many layers of cells, top is round and pillowed
withstand toxicity of urine and accommodate stretch
in urinary tract

27
Q

where are binucleated cells found

A

surface of transitional epithelium

28
Q

glandular epithelium

A

invagination of epithelial surfaces, formed during embryonic development, proliferation of epithelial cells into underlying connective tissue NOBODY KNOWS TRIGGER

29
Q

exocrine gland

A

maintain continuity with epithelial surface, discharge secretions via ducts

30
Q

endocrine gland

A

degenration of duct leaving islands of epithelial tissue, secretory products go right into blood

31
Q

modes of exocrine secretion

A
  1. merocrine, most common, no loss of membrane (ex: goblet cell)
  2. apocrine - secretory product in vesicles (ex: mammary gland)
  3. holocrine - whole cell broken for discharge of products (ex: sebaceous gland)
32
Q

secretion into lumen is through what layer

A

apical (exocrine)

33
Q

secretion into blood vessel is through what layer

A

basal (endocrine)

34
Q

goblet cell is what type of gland

A

unicellular

35
Q

goblet cells use what type of secretion

A

merocrine

36
Q

synthesis of mucigen

A

protein component in RER, goes to golgi where a carb gets attached

37
Q

release of mucigen

A

secreted at steady basal rate, local irritation will cause release of entire mucigen content

38
Q

function of goblet cells

A

in upper GI tract, provide protection coat against autodigestion
in lower GI tract, provide lubrication
in respiratory tract, prevent drying and helps humidify inspired air and act as sticky surface to trap dust and microorganisms so they don’t go to lungs

Bree - Structures (34 decks)

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