Wilkes BIO 121 Exam 2 Flashcards

37035361	ion channel	don't have physical contact.. "opening gate"
37035362	facilitated diffusion	protein embedded that moves;; "pick ship up over gate"
37035363	intermediate filaments	cables of overlapping tetramers;; fibrous proteins that prevent stretching;; their function is mechanical support;;; example: fingernails
37035364	microfilaments	fibers out of actic that generate motion; ; arranged in double helix;; + to the pront;; - off back
37035365	poisons	these interfere with acting because movement generated by actin is essential for cells to grown and function
37035366	microtubules	fibrous protein with complex structure;; position organelles;; move things in cellsa nd help cells actually move
37035367	microtubules	move organelles inside cells by railroad tracks;; the motor proteins drag organelles where they need to go ((uses kinesin and dynein)
37035368	taxol	prevent microtubules from falling off the back which stops cell division
37035369	microtubule organizing centers	first gets into position then adds positive end MT's >> add too ;; away from ****
37035370	centrosome	MTOC of animals;; made up of 2 centrioles with a triplets of microtubules
37035371	flagella	longer
37035372	cilia	shorter, and more numerous
37035373	motility	what functions are performed by cilia and flagella
37035374	what makes cilia and flagella move	when dynein walks down the neighbor microtubule
37035375	extracellular matrix	mess of different proteins;; mix of glycoproteins foudn outside the cells;; animal cells
37035376	cellulose	what are cell walls in plant cells made of?
37035377	plasmodesmata	gaps in cell walls lined with plasma membranes;; ER runs through entire cell
37035378	continuous ER	why do we say that in some ways a plant is a single giant cell
37035379	amphipathic	why 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