Flashcards: biology ch. 7
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Created by:
esheldon123 on September 22, 2008
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Terms | Definitions |
|---|---|
 cell membrane | a phospholipid layer that covers a cell's surface and acts as a barrier between the inside of a cell and the cell's environment |
| cytoplasm | the region of the cell within the membrane |
| ribosome | a cell organelle where protien synthesis occurs |
| prokaryote | an organism that does not have nucleus or membrane-bound organelles |
| eukaryote | a single-celled organism that does not have a nucleus or membrane-bound organelles |
| nucleus | in a eukaryote cell, a membrane-bound organelle that contains the cell's DNA |
| organelle | one of the small bodies that are found in the cytoplasm of a cell and that are specialised to prefrom a specific function |
| vesicle | a small cavity or sac that contains materials in a eukaryotic cell |
| endoplasmic reticulum | a system of membranes that is found in a cell's cytoplasm and that assists in the prduction, processing, and transport of protiens and the production of lipids |
| golgi appartus | a cell organelle that helps make and package materials to be transported out of the cell |
| vacuole | a fluid-filled vesicle found in the cytoplasm of plant cells or protists |
| chloroplasts | an organelle found in the plant and algae cells where photosyntheses occurs |
| mitochondrion | in eukaryotic cells, the cell organelle that is surrounded by two membranes and that is the site of cellular respiration |
| tissue | a group of similar cells that performs a common function |
| organ | a collections of tissues that carry out a specialiazed function of the body |
| organ system | a group of organs that work together to perform body functions |
| colonial organism | a collection of genetically identical cells that are permanently assosciated but in which little or no intergration of cell activities occurs |
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