| A | B |
|---|
| Cell | Basic unit of all forms of life |
| Cell Membrane | Thin, flexible barrier that surrounds all cells; regulates what enters and leaves the cell |
| Cell Wall | Strong, supporting layer around the cell membrane in some cells |
| Centriole | Structure in an animal cell that helps to organize cell division |
| Chloroplast | Organelle found in cells of plants and some other organisms that captures the energy from sunlight and converts it into chemical energy |
| Cytoplasm | In eukaryotic cells, all cellular contents outside the nucleus; in prokaryotic cells, all of the cell's contents |
| Cytoskeleton | Network of protein filaments in eukaryotic cell that gives the cell its shape and internal organization and is involved in movement |
| Diffusion | Process by which particles tend to move from an area where they are more concentrated to an area where they are less concentrated |
| Endocytosis | The movement of materials into a cell |
| Endoplasmic Reticulum | Internal membrane system found in eukaryotic cells |
| Eukaryote | Organism whose cells contain a nucleus |
| Exocytosis | The movement of materials out of the cell |
| Facilitated Diffusion | Process of diffusion in which molecules pass across the membrane through cell membrane channels |
| Golgi Apparatus | Organelle in cells that modifies, sorts and packages proteins and other materials from the endoplasmic reticulum for storage in the cell or release outside the cell |
| Homeostasis | Relatively constant internal physical and chemical conditions that organisms maintain |
| Hypertonic | When comparing two solutions, the solution with the greater concentration of solutes |
| Hypotonic | When comparing two solutions, the solution with the lesser concentration of solutes |
| Isotonic | When the concentration of two solutions is the same |
| Lipid Bilayer | Flexible double-layered sheet that makes up the cell membrane and forms a barrier between the cell and its surroundings |
| Lysosome | Cell organelle that breaks down lipids, carbohydrates, and proteins into small molecules that can be used by the rest of the cell |
| Mitochondrion | Cell organelle that converts the chemical energy stored in food into compounds that are more convenient for the cell to use |
| Nucleus | Structure that contains the cell's genetic material in the form of DNA |
| Organ | Group of tissues that work together to perform closely related functions |
| Organ System | Group of organs that work together to perform a specific function |
| Organelle | Specialized structure that performs important cellular functions within a eukaryotic cell |
| Osmosis | Diffusion of water through a selectively permeable membrane |
| Osmotic Pressure | Pressure that must be applied to prevent osmotic movement across a selectively permeable membrane |
| Prokaryote | Unicellular organism that lacks a nucleus |
| Ribosome | Cell organelle consisting of RNA and protein found throughout the cytoplasm in a cell and the site of protein synthesis |
| Selectively Permeable | Property of biological membranes that allows some substances to pass across it while others canno |
| Solute | Substance that is dissolved in a solution |
| Solution | Type of mixture in which all the components are evenly distributed |
| Solvent | Dissolving substance in a solution |
| Tissue | Group of similar cells that perform a particular function |
| Vacuole | Cell organelle that stores materials such as water, salts, proteins, and carbohydrates |
