click below
click below
Normal Size Small Size show me how
Ch. 3 Cells
| Term | Definition |
|---|---|
| Cell | |
| The smallest functional and structural unit of all living organisms usually consists of a nucleus and a membrane. | |
| Cell membrane | A phospholipid layer that covers a cells surface; acts as a barrier between the inside of a cell and the cells environment. |
| Organelle | One of the small bodies in a cells cytoplasm that are specialized to perform a specific function. |
| Nucleus | In a eukaryotic cell, a membrane-bound organelle that contains the cells DNA and that has a role in processes such as growth, metabolism, and reproduction. |
| Prokaryote | An organism that consists of a single cell that does not have a nucleus. |
| Eukaryote | An organism made up of cells that have a nucleus enclosed by a membrane; eukaryotes include animals, plants, and fungi, but not archaea or bacteria. |
| Cell wall | A rigid structure that surrounds the cell membrane and provides support to the cell. |
| Lysosomes | A cell organelle that contains digestive enzymes |
| Mitochondria | In the eukaryotic cells the cell organelle that is surrounded by two membranes and is the site of cellar respiration |