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Bio Chap 3 Sec 1
Biology
| Question | Answer |
|---|---|
| Light Microscope | Light passes through one or more lenses to produce an enlarged image of a specimen |
| electron microscope | Forms an image of a specimen using a beam of electrons rather than light |
| Magnification | The ability to make an image appear larger than its actual size |
| resolution | A measure of the clarity of an image |
| scanning tunneling microscope | Uses needle like probe to measure differences in voltage caused by electrons that leak, or tunnel, from the surface of the object being viewed |
| Cell theory | 1. All living things are made of one or more cells 2. Cells are the basic units of structure and function in organisms 3. All cells arise from existing cells |
| cell membrane | Encloses the cell and separates the cell interior from its surroundings |
| cytoplasm | The interior of a cell |
| cytoskeleton | A system of microscopic fibers inside the cell |
| ribosome | Cellular structure on which proteins are made |
| prokaryote | A single celled organism that lacks a nucleus and other internal compartments |
| cell wall | A structure that surrounds the cell membrane and provides support for the cell |
| flagellum | Long threadlike structures that protrude from the cell’s surface and enable movement |
| eukaryote | Cells which have a nucleus and other comparments or organelles enabling these cells to function differently from bacteria |
| nucleus | Internal compartment that houses the cells DNA |
| organelle | Structures that carry out specific activities in the cell |
| cilium | Short hairlike structures that protrude from the surfce of some eukaryotic cells. Propel some cells through their environment |
| phospholipid | A lipid made of a phosphate group and two fatty acids |
| lipid bilayer | The phospholipids in cell membrane are arranged in a double layer |
| endoplasmic reticulum | an extensive system of internal membranes that move protiens and others substances through the cell |
| vesicle | A small membrane bound sac that transport substances |
| Golgi apparatus | A set of flattened, membrane-bound sacs that serves as the packaging and distribution center of the cell |
| lysosome | Small spherical organelles that contain the cell’s digestive enzymes |
| mitochondrion | harvests energy from organic compounds to make ATP |
| chloroplast | Use light energy to mak carbohydrates from carbon dioxide and water |
| central vacuole | Found in plant cells. Stores water and may contain substance including ions, nutrients and wastes |
Created by:
lin122