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Chapter 4&5

TermDefinition
cell theory theory that states that all living things are made up of one or more cells, that cells are the basic unit of organisms, that each cell in a multicellular organism has a specific job, and that cells come only from existing cells
Cytosol the soluble portion of the cytoplasm, which includes molecules and small particles, such as ribosomes, but not the organelles covered with membranes
microfilament a fiber found inside eukaryotic cells that is composed mainly of the protein actin and that has a role in cell structure and movement
plastid an organelle of plant cells that contains specific substances and performs specific functions for the cell; examples include chloroplasts and chromoplasts
ion channel a complex of protein molecules in a cell membrane that form a pore through which ions can pass
sodium potassium pump a carrier protein that uses ATP to actively transport sodium ions out of a cell and potassium ions into the cell
pinocytosis a method of active transport across the cell membrane in which the cell takes in extracellular fluids
Created by: nwbs