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12 Cards in this Set

  • Front
  • Back
cell theory
generalization that all living things are composed of cells, and that cells are the basic unit of structure and function in living things
micrograph
photograph of the view through a microscope
organelle
part of a cell with a specific function
plasma membrane
thin outer boundary of a cell that regulates the traffic of chemicals between the cell and its surroundings
nucleus
in an atom, the central core that contains protons and neutrons in a cell, the part that houses the cell's genetic material in the form of DNA
cytoplasm
region of a cell between the nucleus and the plasma membrane
cell wall
strong wall outside a plant cell's plasma membrane that protects the cell and maintains its shape
prokaryotic cell
cell lacking a nucleus and most other organelles
eukaryotic cell
cell with a nucleus (surrounded by its own membrane) and other internal organelles
phospholipid bilayer
two-layer "sandwich" of molecules that surrounds a cell
diffusion
net movement of the particles of a substance from where they are more concentrated to where they are less concentrated
equilibrium
point at which the number of diffusing molecules moving in one direction is equal to the number moving in the opposite direction