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16 Cards in this Set

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Zona occludens
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
tonofilaments
anchor desmosomes and radiate into the interior of the cell
Macula adherens
desmosome
disk-shaped appositions of plaques anchored by tonofilaments
hemidesmosome
1/2 desmosome - used to attach squamous epithelial cells to basement membrane
Gap junction
on freeze frame: densely arranged hexagonal lattice of small particles corresponding to tubular protein subunits called connexons
type of collagen found in basement membranes
type IV collagen
Myosin
non-muscle myosin in epithelial cells is ass'd w/ actin filaments
-found in muscle, microvilli
microvilli
extensions of bundles of actin filaments, aka microfilaments
Desmin
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
Desmoplakin
intracellular portion of hemidesmosomes
-interacts with intermediate filaments
Dynein
cellular "motor" that transports vesicles along microtubules (Dynein Drags molecules in)
-responsible for mvmt of cilia and flagella
Kinesin
cellular "motor" - transports vesicles along microtubules
-Kinesin Kicks the molecules out
What do intemediate filaments do?
Provide mechanical stability for cells.
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
Hepatocytes have a high concentration of what organelle?
SER
-this is where p450 lives and detoxifies
Direction/orientation of microtubles?
Plus end toward the Plasma
minus end toward nucleus