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Science Vocab #3
Cell Vocabulary
| Term | Definition |
|---|---|
| Cell | the smallest unit that can live on its own and that makes up all living organisms and the tissues of the body |
| Osmosis | osmosis is the movement of water molecules from a solution with a high concentration of water molecules to a solution with a lower concentration of water molecules, through a cell's partially permeable membrane. |
| Cell Theory | states that all biological organisms are composed of cells; cells are the unit of life and all life come from preexisting life |
| Cell Wall | a rigid layer of polysaccharides lying outside the plasma membrane of the cells of plants, fungi, and bacteria |
| Cell Membrane | found in all cells and separates the interior of the cell from the outside |
| Nucleus | the structure in a cell that contains the chromosomes |
| Organelle | any of a number of organized or specialized structures within a living cell |
| Ribosome | an intercellular structure made of both RNA and protein |
| Nucleic Acid | the main information-carrying molecules of the cell |
| Selectively Permeable | its ability to differentiate between different types of molecules, only allowing some molecules through while blocking others |
| Cytoplasm | The fluid inside a cell but outside the cell's nucleus |
| Mitochondria | membrane-bound organelle found in the cytoplasm of almost all eukaryotic cells |
| Endoplasmic Reticulum | a network of membranous tubules within the cytoplasm of a eukaryotic cell, continuous with the nuclear membrane. It usually has ribosomes attached and is involved in protein and lipid synthesis. |
| Golgi Apparatus | responsible for transporting, modifying, and packaging proteins and lipids into vesicles for delivery to targeted destinations |
| Chloroplast | plant cell organelles that convert light energy into relatively stable chemical energy via the photosynthetic process |
| Lysosome | an organelle in the cytoplasm of eukaryotic cells containing degradative enzymes enclosed in a membrane. |
| DNA | The molecule inside cells that contains the genetic information responsible for the development and function of an organism |
| Passive Transport | a type of cellular transport in which substances such as ions and molecules move down their respective concentration |
| Active Transport | a kind of cellular transport where substances move against a concentration gradient |
| Diffusion | process resulting from random motion of molecules by which there is a net flow of matter from a region of high concentration to a region |
| Tissue | A group or layer of cells that work together to perform a specific function |
| Organ | A part of the body that performs a specific function |
| Organ System | a group of organs that work together to perform one or more functions |
| Endocytosis | a process by which cells absorb external material by engulfing it with the cell membrane |
| Exocytosis | a form of bulk transport during which large numbers of molecules are transported out of the cell |
Created by:
Corrin Snow Burrell
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