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Ch. 3 Cells
Term | Definition |
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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 |