Theresa's NHCC Biol 1000 & 1001 Pages
    Last updated 3/15/2004.

In the following diagram, the two solutions are separated by a semipermeable membrane.  This membrane is permeable only to water molecules.  Use this information to answer 1 & 2 below.
1. What is the tonicity of the left side of the container relative to the right?  Right to left?
2. What is the net direction of water movement in the container?  (Why?)
 

3. Compare & contrast diffusion & osmosis.
4. What is tonicity?
5. What mechanisms have organisms developed to deal with diffusion/osmosis problems created by their environment?
(6). This one is just to make you think:  how do living systems maintain their ordered states?

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