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7 Cards in this Set

  • Front
  • Back
passive transport
a process of moving substances across the cell membranes without any input of energy by the cell
diffusion
the movement of molecules from an area of higher concentration to an area of lower concentration
concentration gradient
the difference in the concentration of molecules across a distance
equilibrium
the concentration of molecules is the same throughout the space the molecules occupy
osmosis
the process by which water molecules diffuse across a cell membrane from an area of higher concentration to an area of lower concentration
hypotonic
when the concentration of solute molecules outside the cell is lower than the concentration in cytosol (water diffuses INTO the cell until equilibrium is established)
hypertonic
when the concentration of solute molecules outside the cell is higher than the concentration in the cytosol (water diffuses OUT of the cell until equilibrium)