| A | B |
|---|
| Active Transport | Energy requiring process in which particles move from an area of lower concentration to an area of higher concentration |
| Cell Theory | All living things are composed of one or more cells or cell fragments |
| Cell Wall | Structure that lies outside the plasma membrane and provides support and protection |
| Diffusion | Random movement of ions and other particles from an area of higher concentration to an area of lower concentration |
| Dynamic Equilibrium | The point reached in diffusion when the numbers of particles entering and leaving a region are equal |
| Endocytosis | Process by which the plasma membrane of a cell surrounds material, engulfs it, and takes in the material from its environment |
| Facilitated Diffusion | Use of transport proteins to help the passage of the material of particles across the plasma membrane |
| Fluid Mosaic Model | A current model of cell membrane structure in which the membrane is a phosopholipid bilayer with proteins embedded in it |
| Middle Lamella | The secondary wall in in plants, which lies inside the primary wall. It is composed of protein: it strengthens the cell wall and provides support |
| Osmosis | Diffusion of water into and out of cells througha selectively permeable membrane from a region of higherconcentration to a region of lower concentration |
| Passive Transport | The movement of particles across membranes from an area of greater concentration to an area of lower concentration as a result of a net random motion |
| Phagocytosis | Process in which a cell takes in solid chunks of material |
| Pinocytosis | Process in which a cell takes liquid droplets into itself |
| Plasma Membrane | Outer boundary of a cell that regulates which particles leave and enter the cell |
| Selectively Permeable Membrane | A membrane that is added to expel or admit particles used by the cell |
| Transport Protein | Membrane proteins that play a role in the passage of particles through the plasma membrane |
| Exocytosis | Reverse process of endocytosis in which cell products or wastes are enclosed in vesicles and released to the surrounding |
| Vesicle | Small substance-containing sac formed from the plasma membrane in the process of endocytosis |
| Copper Sulfate | A substance that will diffuse in water |
| Solids | Objects that particles may not diffuse through |
