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Chapter 1

cell structure and function

diffusion the process by which small molecules move across the cell membrane molecules move from a higher area of concentration to an area of lower concentration
osmosis the diffusion of water molecules through a selectively permeable membrane
passive transport the movement of materials through a cell membrane without using cellular energy
active transport the movement of materials through a cell membrane using cellular energy
selectively permeable some substances can pass through the cell membrane while others can't
cell the basic unit of structure and function i living things
microscope an instrument that makes small objects look larger
cell theory states:-all living things are composed of cells -cells are the basic units of structure and function in living things -all cells are made of cells
organelles carry out specific functions and within cells
cell wall a layer of nonliving material that protects and holds up a plant cell
cell membrane a barrier after the cell wall that lets certain things in and out of the cell
nucleus the "brain" of the cell that is a large oval structure
cytoplasm the region between the cell wall and the nucleus
mitochondria converts energy into food for the cell; powerhouses of cells
endoplasmic reticulum carries out proteins and other materials through the cell wall
ribosomes produce proteins
Golgi body receives, packages, and distributes newly formed materials throughout the cell
chloroplasts capture energy from sunlight and use it to make food for the cell
vacuole storage area for cells
lysosome contains chemicals that break down most materials in cells
Created by: ghill