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10 Cards in this Set
- Front
- Back
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In general, where are epithelial tissues found?
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surfaces, lines cavities, form glands
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What are the functions of epithelial? (5)
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1) protect against abrasion
2) physical barriers ex. digestive system 3) transport: kidney, intestine 4)excretion / secretion: urinary system 5) sensations: skins.. |
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What are the characteristics of epithelial tissues?
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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 |
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What are the characteristics use to classified epithelial? (3)
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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. |
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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.
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What are a tell-tale sign that an epithelial tissue is a pseudostratified columnar?
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presence of cilia on top.
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What is a terminal bar?
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terminal bar stains really well and helps define the boundary of epithelial cells where junction complex is located.
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MAKE SURE TO BE FAMILIAR WITH THE EPITHELIAL SPECIALIZATION CHART!!
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know structure, location, majors proteins, and functions.
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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. |
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Glands are characterized by what happens to cell when its secretes. List the 3 characterization and examples of it.
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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) |
