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Details Title: Vocabulary Chapter 2 Description: SCIENCE Total Flash Cards: 20 Created: 10/30/2003 08:00:00	To study from this set of flash cards, or to create your own your own study flash cards, register HERE. If you are already a registered user, CLICK HERE.
Cards Term cell theory Definition A major theory of life science that (1)all organisms consist of cells (2)cells are basic units of structure & function in organisms (3)all cells come from other cells Term cell membrane Definition The selectively permeable outer boundary of a cell that allows for food & oxygen to move into the cell and wastes to leave it Term cell wall Definition A rigid structure made of cellulose that surrounds a plant cell membrane to support & protect it Term chloroplasts Definition A plant cell organelle in which light energy is changed into chemical energy in the form of sugar during the process of photosynthesis Term chromatin Definition Long strands of DNA in a cell's nucleus Term compound light microscope Definition An instrument that uses lenses to magnify objects Term cytoplasm Definition The fluid material inside the cell membrane that contains structures that carry out life processes Term electron microscope Definition An instrument using beams of electrons that magnifies objects too small to be seen with a light microscope Term endoplasmic reticulum Definition A cell organelle consisting of folded membranes that move materials around within the cell Term Golgi bodies Definition Cell organelles consisting of stacks of membrane covered sacs that pinch off & move proteins to the outside of the cell Term lysosomes Definition An organelle with chemicals that digest waste and worn out cell parts Term mitochondria Definition A cell organelle that breaks down food molecules and releases energy Term nucleus Definition A structure inside a cell that directs the cell's activities Term organ Definition A structure made up of different types of tissues that work together to do a specific job Term organelles Definition Membrane bound structures within the cytoplasm of eukaryotic cells. Organelles break down food, move wastes and store materials Term organ system Definition A group of organs working together for a specific job. For example, the digestive system Term rejection Definition A process whereby the immune system attacks a transplanted organ Term ribosomes Definition A cell organelle on which protein is made Term tissue Definition Similar cells that do the same sort of work; for example, all muscle tissue contracts Term vacuole Definition A storage area in a cell for water, food or waste products