Concept 6.3 Membranes Regulate the Traffic of Molecules
pp. 118-122 text reading
Biology:   Exploring Life by Campbell, et al.

1.    What is diffusion?
2.    Define the term equilibrium.
3.    What is meant by a selectively permeable membrane?
4.    Define the term passive transport.
5.    How do transport proteins assist in facilitated diffusion?
6.    Define the term osmosis.
7.    Explain why water flows into a cell when it is in a hypotonic environment.
8.    Explain why water flows out of a cell when it is in a hypertonic environment.
9.    Using fig 6-13 p.. 120 of the textbook, explain why water molecules can move
       through the selectively permeable membrane, but the sugar molecules can not.
10.  Define the term active transport.
11.  Where does the energy for active transport come from in the cell?