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BJU Biology

Chapter 3: Introduction to Cells

TermDefinition
absorption transport of dissolved substances into cells to serve as building blocks or energy sources
active transport movement of materials across a cell membrane against the concentration gradient using cellular energy
cell neat chamber shaped structure
cell membrane serves as the outermost boundary of the cell; controls movement of substances into and out of the cell
cell theory all living organisms are made up of cells that perform all the functions of living things; reproduction occurs
cell wall protects and supports cell; found in plants, not in animals or humans
central vacuole provides storage; regulates the turgidity of a cell; found in plants, not in animals or humans
chromatin material a complex of DNA and surrounding proteins in the nucleus of the cell
colonial organism collection of similar cells living together
contractile vacuole collects and pumps water out of the cell; unicellular organisms use these
Created by: cookingandbaking