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Cells Part 2
These are the key terms for Cells Part 2
| Key Term | Definition |
|---|---|
| Active transport | The process of moving molecules across a cell membrane using energy, usually from areas of low concentration to high concentration. |
| Aerobic | Processes that require oxygen, like aerobic respiration, which is how cells use oxygen to turn food into energy. |
| Anaerobic | Processes that do not require oxygen, like anaerobic respiration, which is how cells get energy from food without using oxygen. |
| Anaphase | A stage in cell division where chromosomes are pulled apart to opposite ends of the cell. |
| Apoptosis | Programmed cell death, where cells die in a controlled way to help the body stay healthy. |
| ATP | Adenosine triphosphate, the main energy carrier in cells, like a battery that powers cell activities. |
| Cancer | A disease where cells grow uncontrollably and can spread to other parts of the body. |
| Carbon dioxide | A gas that animals breathe out and plants use to make food during photosynthesis. |
| Cell cycle | The life cycle of a cell. |
| Cellular respiration | The process by which cells break down sugar and oxygen to release energy, producing carbon dioxide and water as waste. |
| Concentration | The amount of a substance in a certain area or volume. |
| Cytokinesis | The final stage of cell division where the cytoplasm splits, resulting in two new cells. |
| Diffusion | The movement of molecules from an area of high concentration to an area of low concentration. |
| Endocytosis | The process by which a cell takes in materials by engulfing them in its membrane. |
| Equilibrium | A state where the concentrations of molecules are balanced on both sides of a membrane. |
| Exocytosis | The process by which a cell releases materials to the outside by merging a vesicle with the cell membrane. |
| Fermentation | A way cells make energy without oxygen, producing substances like alcohol or lactic acid. |
| Glucose | A simple sugar that is an important energy source for cells. |
| Gradient | A difference in concentration of a substance across a space. |
| Homeostasis | The process by which organisms maintain a stable internal environment. |
| Hypertonic | A solution with a higher concentration of solutes compared to another solution, causing cells to shrink. |
| Hypotonic | A solution with a lower concentration of solutes compared to another solution, causing cells to swell. |
| Interphase | The phase of the cell cycle where the cell grows and prepares for division. |
| Isotonic | A solution with the same concentration of solutes as another solution, causing no change in cell size. |
| Metabolism | All the chemical reactions that occur within an organism to maintain life. |
| Metaphase | A stage in cell division where chromosomes line up in the middle of the cell. |
| Mitosis | The process of cell division that splits the nucleus of the cell in two |
| Osmosis | The movement of water molecules through a membrane from an area of high solute concentration to low solute concentration. |
| Oxygen | A gas that is essential for most living organisms to breathe and produce energy. |
| Passive transport | The movement of molecules across a cell membrane without using energy. |
| Photosynthesis | The process by which plants use sunlight, carbon dioxide, and water to make food and oxygen. |
| Prophase | The first stage of cell division where chromosomes become visible and the nuclear membrane dissolves. |
| Telophase | The final stage of cell division where new nuclear membranes form around each set of chromosomes. |
| Molecule | A group of atoms that are held together by chemical forces; the smallest unit of a compound that keeps all of the qualities of that compound. |
| Lactic Acid | A organic acid compound produced during fermentation by the breakdown of carbohydrates without using oxygen. |
| Density | the ratio of the mass of a substance to the volume of a substance |
| Chromatin | loose strands of DNA and proteins; invisible to naked eye during Interphase |
| Chromatid | coiled or wrapped strands of DNA and proteins; half of a chromosome; semi-visible during late Interphase |
| Chromosome | In a eukaryotic cell; one of the structures in the nucleus that are made up of DNA and proteins; visible during late Interphase |
| Centromere | A structure in a chromosome that holds together two chromatids. |
| Semi-Permeable | A selective barrier that allows certain molecules to pass through but blocks others, based on factors like size, charge, or chemical properties |