| Term | Definition |
|---|
| Active Transport | Process by which cells transport materials against the concentration gradient using ATP energy |
| Endocytosis | Active transport process where a cell engulfs materials with a portion of the cell's plasma membrane and releases the contents inside of the cell. |
| Exocytosis | Active transport process by which materials are secreted or expelled from a cell. |
| Facilitated Diffusion | Passive transport of materials across a plasma membrane by transport proteins embedded in the plasma membrane |
| Hypertonic Solution | Solution in which the concentration of dissolved substances outside the cell is higher than the concentration inside the cell (cell shrinks) |
| Hypotonic Solution | Solution in which the concentration of dissolved substances is lower in the solution outside the cell than the concentration inside the cell. (cell bursts) |
| Isotonic Solution | Solution in which the concentration of dissolved substances in the solution is the same as the concentration of dissolved substances inside a cell. |
| Osmosis | movement of water from an area of highnest concentration to low concentration |
| Passive Transport | Movement of particles across cell membranes by diffusion or osmosis; the cell uses no energy to move particles across the membrane. |
| Mitosis | Containing a complete set of chromosomes |
| Organ | Group of tissues working together to perform a function. |
| Organ System | Group of organs working together to perform a specific function |
| Tissue | Group of cells working together to perform a function |
| Cancer | Uncontrolled cell division that may be caused by environmental factors or by genetic influence. |
| Gene | Segment of DNA that codes for a particular protein |
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