CELL ORGANELLES-Bio II
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Created by:
LStefanucci on February 17, 2009
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26 terms
Terms | Definitions |
|---|---|
 nucleus | control center of the cell; contains DNA |
| cell membrane | regulates what enters and leaves the cell |
| ribosomes | site of protein synthesis |
| mitochondria | converts stored energy into ATP |
| cytoplasm | jelly-like space between cell membrane and organelles |
| Golgi apparatus | sorts, packages materials like proteins for export |
| vacuole | sac-like structure; stores water,nutrients |
| endoplasmic reticulum (ER) | transports proteins throughout the cell |
| lysosome | contain enzymes for intracellular digestion |
| organelle | specialized intracellular structures |
| cytoskeleton | assists in maintaining cell shape & movement;made of microfilaments |
| centrosome | microtubule-organizing center used during cell division |
| cell | basic structural & functional unit of life |
| semi-permeable | membranes that allow some substances through but not others |
| phospholipid | a lipid that contains phosphorus and that is a structural component in cell membranes |
| cholesterol | steroid molecule in the plasma membranes; fills spaces and influences motion of tails |
| hydrophobic | "Water-fearing"; pertaining to nonpolar molecules (or parts of molecules) that do not dissolve in water. |
| hydrophyllic | water loving (polar) area of plasma membrane |
| transmembrane protein | Is "integral"; passes through the lipid bilayer |
| peripheral protein | On surface of cell membrane, not embedded in the lipid bilayer. |
| glycoprotein | cell surface carbohydrate/protein; important for communication and intercell identification |
| lipid bilayer | double-layered sheet that forms the core of nearly all cell membranes |
| nucleolus | site of ribosome synthesis |
| peroxysomes | Small vesicles that contain enzymes that change harmful substances into safe ones |
| vesicles | small membrane sacs that specialize in moving products into, out of, and within a cell. |
| microfilaments | for support and/or motility |
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