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| cell | the smallest unit of matter that can carry on all the processes of life |
| cell theory | the theory that all living things are made up of cells, that sells other basic unit organisms, and that settles come only from existing cells. |
| nucleus | the large organelle near the center of the cell. |
| eukaryote | organism whose cells contain a membrane bound nucleus. |
| prokaryote | unique cellular organisms that lack a membrane bound nucleus and organelles. |
| cell membrane | a thin membrane that surrounds the entire cell. |
| organelle | internal structures of cells that perform specific functions |
| selectively permeable | some substances easily cross the cell membrane, while others cannot cross at all |
| peripheral proteins | proteins that are attached to the surface of cell membranes |
| integral proteins | proteins that are embedded in the lipid bilayer of cell membranes. |
| Cytoplasm | the area of the cell between the nucleus and the cell membrane. |
| Mitochondria | organelle that transfers energy from organic compounds to ATP |
| ribosome | organizes the synthesis of proteins |
| endoplasmic reticulum | prepares proteins for export, the transportation system of the cell. |
| golgi apparatus | processes and packages substances produced by the cell. |
| Lysosome | digests molecules, old organelles, and foreign substances |
| Cilia and flagella | propels cells through the environment; movement organelles |
| nucleus | stores hereditary information in DNA |
| cell wall | supports and protects the cell; found only in plants |
| vacuole | stores enzymes, water, or waste products |
| chloroplasts | organelles in plant cells which convert the energy from the sun into organic compounds like sugar |
