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pollard-abbott
cell structure
| Term | Definition |
|---|---|
| cell theory | Generalization that all living things are composed of cells,and that cells are the basic unit of structure and function in living things. |
| Organelle | Part of a cell with a specific function. |
| Plasma membrane | Thin outer boundary of a cell that regulates the traffic of chemicals between the cell and its surroundings. |
| Nucleus | In an atom, the central core that contains protons and neutrons in a cell, that part that houses the cell's genetic material in the form of DNA. |
| Cytoplasm | Region of a cell between the nucleus and the plasma membrane. |
| Cell wall | Strong wall outside a plant cell's plasma membrane that protects the cell and maintains it's shape. |
| Prokaryotic cell | Cell lacking a nucleus and most other organelles. |
| Eukaryotic cell | Cell with a nucleus (surrounded by it's own membrane) and other internal organelles. |
| Nuclear envelope | Double membrane that surrounds a cell nucleus. |
| Nucleolus | Ball-like mass of fibers and granules in a cell nucleus. |
| Endoplasmic reticulum | Network of membranes within a cell's cytoplasm that produces a variety of molecules. |
| Golgi apparatus | Cellular organelle that modifies, stores, and routes cell products. |
| Vacuole | Membrane-bound sac that buds from the endoplasmic reticulum or the golgi apparatus. |
| Lysosome | Membrane-bound sac containing digestive enzymes that can break down proteins,nucleic acids, and polysaccarides. |
| Mitochindria | Cellular organelles where cellular respiration occurs. |
| Chloroplast | Organelle found in some plant cells and certain unicellular organisms where photosynthesis takes place. |
| Ribosome | Cluster of proteins and nucleic acids that constructs proteins in a cell. |
| Flagella | Long, thin, whip-like structures, with a core of microtubules, that enable some cells to move. |
| Cilia | Short structures projecting from a cell and containing bundles of microtubules that move a cell through it's surroundings or move fluid over the cell's surface. |
| Cell specialization | The cell performing a specific function for a large organ or tissue. |
| Centriole | A self-replicating, small, fibrous, cylindrical-shaped organelle, typically located in the cytoplasm near the nucleus in cells of most animals It is involved in the process of nuclear division. |
| Cytoskeleton | The lattice or internal framework of a cell composed of protein filaments and microtubules in the cytoplasm, and has a role in controlling cell shape, maintaining intracellular organization, and in cell movement. |