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Intro to Cells
4.2 Terms
| Term | Definition |
|---|---|
| plasma membrane (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 that includes the fluid, the cytoskeleton, and all of the organelles except the nucleus |
| cytosol | the soluble potion of the cytoplasm, which includes molecules and small particles, such as ribosomes, but not the organelles covered with membranes |
| nucleus | in physical science, an atom's central region, which is made up of protons and neutrons |
| prokaryote | a single-celled organism that does not have a nucleus or membrane-bound organelles; examples are archaea and bacteria |
| eukaryote | an organism made up of cells that have a nucleus enclosed by a membrane, multiple chromosomes, and a mitotic cycle; eukaryotes include protists, animals, plants, and fungi but not archaea or bacteria |
| organelle | one of the small bodies that are found in the cytoplasm of a cell and that are specialized to perform a specific function |
| tissue | a group of similar cells that perform a common function |
| organ | a collection of tissues that carry out a specialized function of the body |
| organ system | a group of organs that work together to perform body functions |
Created by:
mitschj20
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