1	cell theory		_____	controls the passage of materials in and out of the cell
2	cytoplasm		_____	drives molecules across a membrane form a region of lower concentration to a region of higher concentration
3	organelle		_____	a rigid layer that gives protection to the cell
4	prokaryotic cell		_____	opposite of endocytosis
5	eukaryotic cell		_____	movement of molecules across a cell membrane without energy input from the cell
6	cytoskeleton		_____	fluid-filled sac used for the storage of materials needed by the cell
7	nucleus		_____	carry out photosynthesis
8	endoplasmic reticulum		_____	lower concentration than the cell
9	ribosome		_____	type of endocytosis involving large particles
10	Golgi apparatus		_____	diffusion of molecules through transport proteins
11	vesicle		_____	the difference in the concentration of a substance from one location to another
12	mitochondrion		_____	the storehouse for most genetic information
13	vacuole		_____	cells that have a nucleus
14	lysosome		_____	process of taking liquids into a cell by engulfing them in the membrane
15	centriole		_____	membrane bound organelles that contain enzymes
16	cellwall		_____	cells that do not have a nucleus
17	chloroplast		_____	structures specialized to perform distinct processes within a cell
18	cellmembrane		_____	higher concentration than the cell
19	phospholipid		_____	tiny organelles that link amino acids together to form proteins
20	fluid mosaic model		_____	consists of closely layered stacks of membrane-enclosed spaces that process, sort, and deliver proteins
21	selective permeability		_____	protein that detects a signal molecule and performs an action in response
22	receptor		_____	cylinder-shaped organelles made of short microtubules arranged in a circle
23	passive transport		_____	allows some but not all materials to cross the cell membrane
24	diffusion		_____	same concentration of dissolved particles
25	concentration gradient		_____	movement from a high water concentration to a low water concentration
26	osmosis		_____	theory that states all organisms are made of cells, all cells are produced by other living things, and the cell is the most basic unit of life
27	isotonic		_____	movement of molecules in a fluid or gas
28	hypertonic		_____	network of proteins that is constantly changing to meet the needs of a cell
29	hypotonic		_____	small membrane-bound sacs that divide some materials from the rest of the cytoplasm and transport these materials from place to place within the cell
30	facilitated diffusion		_____	contains a phosphate group, glycerol, and two fatty acid chains
31	active transport		_____	supply energy to the cell
32	endocytosis		_____	describes the arrangement of the molecules that make up a cell
33	phagocytosis		_____	a jellylike substance that contains dissolved molecular building blocks
34	exocytosis		_____	interconnected network of thin folded membranes