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29 Cards in this Set
- Front
- Back
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What characteristics of cells is most important in higher ordered org?
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Communication/networking
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What is the name of the substance to fix the body parts in order to cut it?
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Parafilm
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What types of cells covers the inner cavities?
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Epithelial cells
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What is the supportive structure for epi cells?
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the basal lamina
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Capillaries reach the outer most layer. T/F
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False. Epi cells lack direct vascular supplu.
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How are Epi cells held together?
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Linked by junctional complexes
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What are epi cells able to form once differentialted?
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Exocrine and endocrine glands.
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How do you identify cells under a microscope?
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Looking for the nucleus and nucleoli.
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Zonula Occludens
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Closes out surrounding environment from the junctional complex.
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Zonula Adherens
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Anchoring junctions.
Secures it to next cells This and zonula occludens are the two minimal req for junctional complex |
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Terminal bars
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the junctional complexes in a light microscope.
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Macula adherens
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anchoring junctions
adheres so everyone knows what their neighbors doing. |
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Hemidesmosomes
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cements cells together
anchoring junctions adheres to basal lamina |
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Desmosomes
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Surround all skin cells and help them adhere to each other with great strength.
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Why is it important that epithelial cells be polarized?
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So that there is a specific direction for traffic... excretion and absorption
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One layer of cells
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simple epi
Ex. blood vessicles aka endothelium |
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Two or more layers
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stratified
Ex. The skin |
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All cellsrest on basal lamina but not all reach surface
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pseudostratified
ex. trachea |
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Variable number of layers (3-6)
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transitional
Ex. Bladder, where enlargement is needed (balloon) and ureter... doomed shaped cells |
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simple cell structure
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Squamous
Cuboidal Columnar (secretory) |
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Classification by function
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n
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Goblet cells
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found on mucous epithelium
one celled, secretory Originally a normal basal cell that was pre-simple columnar epi cell |
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Keratinized epithelium
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Skin, nails
Cells accumulate protective layer of keratin |
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Microvillous, striated or brush border
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Small intestin
apical surfaces of cells have microvilli to inc surface area thus increasing absorption potential |
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Mesothelium
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protective covering
a simple squamous covering serous membranes |
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Kidney tubules or thyroid glands
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simple cuboidal
Held together tightly, important for gland structure |
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Serous gland
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made up of epithelieal cells (also having a basal membrane) with a lumen. Secrete chemicals. Have a duct that leads to the epi surface.
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Endocrine glands
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derivetive of epithelial cells have lost its duct and now have to secrete their hormones into the circulatory system.
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What are the four basic tissues that are building blocks for organs?
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Epithelial (covering and lining)
Connective (support and connection) Blood and bone Muscle (movement) Nerves (transmission of nerve impulses) |
