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Anatomy & Histology > Epithelium > Flashcards

Epithelium Flashcards

1
Q

what are the primary tissue types?

A

nervous tissue
muscle tissue
epithelial tissue
connective tissue

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2
Q

epithelial tissue..

A

cover body surfaces
lines body cavities
form glands

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3
Q

Functions of Epithelial tissue

A 
physical protection 
permeability control
sensation trigger
secretion
excretion
absorption
gas exchange
gliding and lubrication (mesothelium)
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4
Q

what are the tree suraces of a cell? with regards to cell polarity

A

apical
lateral
basal

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5
Q

characteristics of simple squamous epithelium

A

single layer of flattened cells with disc-shaped cell nuclei

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6
Q

What is the function of simple squamous epithelium?

A

diffusion & filtration

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7
Q

where can you find squamous epithelium cells?

A

blood vessels, lymphatic vessels
kidney glomeruli
air sac of lungs

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8
Q

simple cuboidal epithelium

A

single layer of cube-shaped cells with large, spherical nuclei

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9
Q

function of cuboidal epithelium

A

absorptive or secretory

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10
Q

where can you find simple cuboidal epithelium?

A

kidney tubules
ducts and secretory portion of small glands
ovary surface

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11
Q

simple columnar epithelium

A

single layer of tall cells with round to oval nuclei

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12
Q

function of simple columnar epithelium

A

absorption

secretion of mucus, enzymes and other substances

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13
Q

location of simple columnar epithelium

A

lining of the stomach
small & large intestines
excretory ducts of some glands

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14
Q

what is apical specialization?

A

microvilli as seen with simple columnar epithelium

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15
Q

what do goblet cells do?

A

secrete mucus

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16
Q

what is the function of simple columnar epithelium with goblet cells?

A

involved in protection by secreting mucus that lubricates the surface, or traps inhaled particles

17
Q

pseudostratified columnar epithelia

A

single layer of cells of different heights

all cells rest on the basement membrane but not all reach the surface

18
Q

function of pseudostratified columnar epithelium

A

secrete substances like mucus

propulsion of mucus by ciliary action

19
Q

where can you find pseudostratified columnar epithelium?

A

respiratory tract

epithelium of the trachea and bronchi

20
Q

identify the immage

A

pseudostratified ciliated columnar epithelium with goblet cells

21
Q

stratified squamous epithelium

A

thick epithelium composed of several cell layers
basal layers are cuboidal or columnar & metabolically active
surface cells are flattened (squamous)

22
Q

what is the function of stratified squamous epithelium

A

protects underlying tissues in areas subjected to abrasion

23
Q

how can surface epithelia cells be described as?

A

full of keratin and dean (no nuclei)

24
Q

what does non-keratinized cells mean?

A

surface cells with nuclei (viable)

25
Q

where can you find keratinized cells?

A

skin, hard palate, gingiva

26
Q

where can you find non-keratinized cells?

A

lining of esophagus, mouth of vagina

27
Q

is this keratinized or non keratinaized?

A

keratinized

28
Q

is this keratinized or nonkeratinized?

A

nonkeratinized

- there is no keratin observed on the surface

29
Q

moral than 90% of oral or pharyngeal cancers are derived from

A

epithelial cells

squamous cell carcinoma

30
Q

what are some types of uncommon epithelia?

A

stratified cuboidal epithelium (ducts of salivary glands)

stratified columnar epithelium (male urethra, pharynx)

31
Q

what is transitional epithelia?

A

represents a transition between stratified squamous and stratified columnar epithelium

32
Q

where can you find transitional epithelium?

A

urinary tract (urothelium)

  • ureters
  • bladder
  • portion of the urethra
33
Q

identify the image

A

transitional epithelium in relaxed state

ex. when bladder is empty

34
Q

identify the image

A

transitional epithelium in extended state

ex. when your bladder is full and it has to make room for more urine it goes to the extended state

Anatomy & Histology (2 decks)

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