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4.1 - 4.2 Terms
terms
| Term | Definition |
|---|---|
| cell | the smallest unit that can perform all life processes; covered by a membrane and contains DNA and cytoplasm |
| cell theory | all living things are made up of one or more cells, that cells are the basic units of organisms, that each cell in a multicellular organism has a specific job, and that cells come only from existing cells |
| cytoplasm | the region of the cell within the membrane that includes the fluid, the cytoskeleton, and all the organelles except the nucleus |
| cytosol | the soluble portion of the cytoplasm which includes molecules and small particles such as ribosomes but not the organelles covered with membranes |
| eukaryote | an organism made up of cells that have a nucleus enclosed by a membrane multiple chromosomes and a mitotic cycle; include animals plants and fungi but not bacteria or archaea |
| nucleus | in a eukaryotic a membrane-bound organelle that contains the cells DNA and that has a role in processes such as growth metabolism and reproduction |
| organelle | one of the small bodies that found in the cytoplasm of a cell and that are specialized to perform a specific function |
| organ | a collection of tissues that carry out a specialized function of the body |
| organ system | a group of organs that accomplish related tasks |
| plasma membrane | the cell's outer boundary |
| prokaryote | a single-celled organism that has no nucleus and has no membrane-bound organelles; examples include bacteria and archaea |
| tissue | a collection of specialized cells and cell products that perform a specific function |
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faithpreston
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