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cells
| Term | Definition |
|---|---|
| cell | the smallest, basic unit of life that makes up all living organisms |
| Osmosis | the movement of water (or another solvent) through a special barrier |
| Cell Theory | a core scientific rule in biology that states all living things are made of cells, |
| cell wall | a rigid, protective outer layer that surrounds the cell membrane of plant, fungal, algal, and bacterial cells |
| cell membrane | a thin, protective layer that surrounds every living cell |
| nucleus | a central part or control center found in different fields |
| Organelle | a tiny, specialized structure inside a cell that performs a specific job |
| Ribosome | a tiny structure inside a cell that makes proteins |
| Nucleic Acid | large, natural molecules that store and share genetic information in living things |
| Selectively Permeable | a barrier—such as a cell membrane—that allows only certain molecules or ions to pass through while blocking others |
| Cytoplasm | the thick, jelly-like fluid and all the material inside a cell |
| Mitochondria | membrane-bound cell organelles that generate most of the chemical energy needed to power a cell's biochemical reactions |
| Endoplasmic Reticulum | membranes, sacs, and tubes inside plant and animal cells that helps make, process, and transport proteins and fats |
| Golgi Apparatus | a cell organelle that modifies, sorts, and packages proteins and lipids to send them to their next destinations |
| Chloroplast | a double-membraned organelle in plant and algal cells that converts sunlight into chemical energy through photosynthesis |
| Lysosome | a membrane-bound cell organelle that contains digestive enzymes to break down waste, old cell parts, and foreign invaders |
| DNA | instruction manual or blueprint inside your cells that tells your body how to grow, look, and work |
| Passive Transport | the movement of molecules or ions across a cell membrane from an area of high concentration to an area of low concentration without using cell energy |
| Active Transport | the movement of molecules or ions across a cell membrane from an area of lower concentration to an area of higher concentration |
| Diffusion | the natural process where particles spread out from an area of high concentration to an area of low concentration |
| Tissue | a group of similar cells working together to perform a specific job in a living organism |
| Organ | a self-contained part of a living body made of different types of tissues working together to do a specific job |
| Organ System | a group of different organs that work together to perform a major job or function in the body |
| Endocytosis | an active cellular process where a cell brings large substances, liquids, or nutrients into itself by engulfing them with its cell membrane. |
| Exocytosis | an active transport process where a cell moves materials from its interior to the outside by enclosing them in a membrane-bound sac that fuses with the cell's outer plasma membrane. |