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10 Cards in this Set

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In general, where are epithelial tissues found?
surfaces, lines cavities, form glands
What are the functions of epithelial? (5)
1) protect against abrasion
2) physical barriers ex. digestive system
3) transport: kidney, intestine
4)excretion / secretion: urinary system
5) sensations: skins..
What are the characteristics of epithelial tissues?
It exhibit polarity
Free surface that face the lumen
Apical surface
Basal
Lateral
Close neighboring cells-adhering to one another
attached to a basal lamina
What are the characteristics use to classified epithelial? (3)
1) number of cell layers (simple / stratified / pseudostratified)
2) cell shape of surface cells
W > L = squamous
W < L = columnar
W = L = cuboidal
transitional
3) specialization of apical surface.
What is a type of specialization on apical surfaces of stratified squamous epithelia?
hint= a hardened material protecting underlaying cell
Keratinized stratified squamous epithelia. - appeared as thin dark line.
What are a tell-tale sign that an epithelial tissue is a pseudostratified columnar?
presence of cilia on top.
What is a terminal bar?
terminal bar stains really well and helps define the boundary of epithelial cells where junction complex is located.
MAKE SURE TO BE FAMILIAR WITH THE EPITHELIAL SPECIALIZATION CHART!!
know structure, location, majors proteins, and functions.
GLAND
Define the three type of glands:
1) Exocrine
2) Endocrine
3) Paracrine
Exocrine gland = apical release to surface or into ducts for transport
Endocrine: Basal release into connective tissue for transport by blood.
Paracrine: release and local actions without blood transport. Acts more locally. Acts on target in vicinity.
Glands are characterized by what happens to cell when its secretes. List the 3 characterization and examples of it.
1) Merocrine= apical release membrane-bound vesicles. Cells still remained intact.
ex: pancreatic acinar cells

2) Apocrine: release in apical portion of cell- bounded by cell membrane. lose part of cells.
Ex: mammary gland

3) Holocrine: discharged as part of a programmed cell death (skin sebaceous gland)