BIOL-1507EL Chapter Notes - Chapter 35: Semipermeable Membrane, Vacuole, Turgor Pressure
19 Apr 2016
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A movement of biochemicals and other atomic or molecular substances across cell membranes without need of energy input. The movement of ions or molecules across a cell membrane into a region of higher concentration, assisted by enzymes and requiring energy. A process by which molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution into a more concentrated one, thus equalizing the concentrations on each side of the membrane. A large, water filled organelle in plant cells that maintain the turgor of the cell and controls movement of molecules between the cytosol and sap. The cytoplasmic membrane surrounding the vacuole, separating the vacuolar contents from the cytoplasm in a cell. A band of cell wall material deposited in the radial and transverse walls of the endodermis, and is chemically different from the rest of the cell wall - the cell wall being made of lignin and without suberin.
