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Unformatted text preview: BIOLOGY 315H Cell communication November 3, 2006 Any cell is in contact with its local chemical environment and must interact with that environment. The plasma membrane is not only a barrier separating the cell's internal chemistry from the external conditions, it is also key in the way the cell communicates with its surroundings. Effective two-way communication is of particular importance for the cells in a multicellular organism, since they must adhere to one another and coordinate their physiological activities to insure the success of the organism as a whole. Much of the communication between cells is chemical in nature - i.e. one or more cells synthesize and secrete a chemical compound that constitutes an intercellular signal, and other cells detect that signal by means of receptor proteins that are highly specific for the signaling molecule. If a sufficient number of signaling of receptor proteins that are highly specific for the signaling molecule....
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- Fall '06