cell and surrounding membrane

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Author:
jessica1111
ID:
264743
Filename:
cell and surrounding membrane
Updated:
2014-03-02 18:05:05
Tags:
cell
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Description:
cell and surrounding membrane
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  1. osmosis
    process by which substances move across a selectively permeable membrane such as a cell's plasma membrane
  2. diffusion
    movement of molecules from an area of relatively high concentration to an area of relatively low concentration
  3. active transport
    requires an input of energy in the form of ATP, can be used to move ions and molecules across the plasma membrane and is often used to move them from areas of low concentration to areas of high concentration
  4. osmolarity
    concentration of dissolved substances
  5. equilibrium
    osmolarity inside the cell must equal osmolarity outside the cell
  6. tonicity
    determined by molecules that cannot cross the cell boundary
  7. molarity
    The molar concentration of a solution, usually expressed as the number of moles of solute per liter of solution

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