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Wilkes BIO 121 Exam 2 Flashcards

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37035361ion channeldon't have physical contact.. "opening gate"
37035362facilitated diffusionprotein embedded that moves;; "pick ship up over gate"
37035363intermediate filamentscables of overlapping tetramers;; fibrous proteins that prevent stretching;; their function is mechanical support;;; example: fingernails
37035364microfilamentsfibers out of actic that generate motion; ; arranged in double helix;; + to the pront;; - off back
37035365poisonsthese interfere with acting because movement generated by actin is essential for cells to grown and function
37035366microtubulesfibrous protein with complex structure;; position organelles;; move things in cellsa nd help cells actually move
37035367microtubulesmove organelles inside cells by railroad tracks;; the motor proteins drag organelles where they need to go ((uses kinesin and dynein)
37035368taxolprevent microtubules from falling off the back which stops cell division
37035369microtubule organizing centersfirst gets into position then adds positive end MT's >> add too ;; away from ****
37035370centrosomeMTOC of animals;; made up of 2 centrioles with a triplets of microtubules
37035371flagellalonger
37035372ciliashorter, and more numerous
37035373motilitywhat functions are performed by cilia and flagella
37035374what makes cilia and flagella movewhen dynein walks down the neighbor microtubule
37035375extracellular matrixmess of different proteins;; mix of glycoproteins foudn outside the cells;; animal cells
37035376cellulosewhat are cell walls in plant cells made of?
37035377plasmodesmatagaps in cell walls lined with plasma membranes;; ER runs through entire cell
37035378continuous ERwhy do we say that in some ways a plant is a single giant cell
37035379amphipathicwhy do phospholipids form bilayers when mixed with water??? water pushes fatty acids in the middle ;; polars are on the outside;; polars can H- bond to these

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