If you have a well in your home, keep a close eye on the color of the water, which may tell you plenty about what might go on down under. If your well water turns an eerie blue or blue-greenish color, you have a problem related to either copper or zinc from bronze fixtures.
67 MembraneStructure andFunction Chapter Concepts 4.1 Plasma Membrane Structure and Function â¢ The plasma membrane regulates the passage ofmolecules into and out of the cell. 68â¢ The membrane contains lipids and proteins.
the plasma membrane is the boundary between the cell and its environment it regulates what enters and exits the cell cells must maintain an appropriate amount of molecules to function inside them they must also have a way to keep things out or to allow things to enter this is the job of the plasma membrane