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16 Cards in this Set
- Front
- Back
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Zona occludens
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tight junction
-small, interconnecting ridges (sealing strands) between 2 cells -extend completely around apical borders of epithelial cells and seal intercellular clefts from contact w/ outside |
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tonofilaments
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anchor desmosomes and radiate into the interior of the cell
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Macula adherens
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desmosome
disk-shaped appositions of plaques anchored by tonofilaments |
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hemidesmosome
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1/2 desmosome - used to attach squamous epithelial cells to basement membrane
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Gap junction
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on freeze frame: densely arranged hexagonal lattice of small particles corresponding to tubular protein subunits called connexons
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type of collagen found in basement membranes
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type IV collagen
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Myosin
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non-muscle myosin in epithelial cells is ass'd w/ actin filaments
-found in muscle, microvilli |
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microvilli
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extensions of bundles of actin filaments, aka microfilaments
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Desmin
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intermediate filament protein
1. necessary for stability of muscle fibrils in striated muscle 2. connects cytoplasmic bodies to membrane dense plaques in actin filament of smooth muscle |
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Desmoplakin
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intracellular portion of hemidesmosomes
-interacts with intermediate filaments |
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Dynein
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cellular "motor" that transports vesicles along microtubules (Dynein Drags molecules in)
-responsible for mvmt of cilia and flagella |
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Kinesin
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cellular "motor" - transports vesicles along microtubules
-Kinesin Kicks the molecules out |
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What do intemediate filaments do?
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Provide mechanical stability for cells.
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Match the cell type to its intermediate filament:
1. epithelial 2. neuronal 3. skeletal muscle 4. mesenchymal (fibroblasts, vascular sm muscle, endothel, macrophages) 5. glial |
1. keratins (cytokeratins)
2. neurofilament proteins 3. desmin 4. vimentin 5. GFAP |
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Hepatocytes have a high concentration of what organelle?
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SER
-this is where p450 lives and detoxifies |
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Direction/orientation of microtubles?
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Plus end toward the Plasma
minus end toward nucleus |
