…within the cell.  Movement of molecules from a high concentration to low concentration.  why does this happen?  What is it called when concentration.

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Presentation transcript:

…within the cell

 Movement of molecules from a high concentration to low concentration.  why does this happen?  What is it called when concentration is the same throughout the area?

 Diffusion of water through a semi-permeable membrane

 What is a solvent?  A substance that dissolves a solute  How about a solute?  A substance that is dissolved in the solvent

 Why will a snail die if you put salt on it?

 Isotonic – same strength, equilibrium  Hypertonic – above strength, high amounts of solute  Hypotonic – below strength, low amounts of solute  Because cells are filled with salts and sugars, water will always want to move into the cell.

 hill.com/sites/ /student_view0/c hapter2/animation__how_osmosis_works.htm l hill.com/sites/ /student_view0/c hapter2/animation__how_osmosis_works.htm l  Facilitated diffusion  hill.com/sites/ /student_view0/c hapter2/animation__how_facilitated_diffusio n_works.html hill.com/sites/ /student_view0/c hapter2/animation__how_facilitated_diffusio n_works.html

 cells shrink when in a ___________________ solution.  All particles of the solute are equally dispersed when the ___________________ is reached.  In diffusion, particles move from a _____ concentration to a ______ concentration.  A _____________________ membrane is present in osmosis.