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Biology lesson 3 voc
Lesson 3 Vocabulary
| Question | Answer |
|---|---|
| Light Microscope | a microscope that uses a beam of visible light passing through one or more lenses to magnify an object |
| Electron Microscope | a microscope that focuses a beam of electrons to magnify objects |
| magnification | the increase of an object's apparent size by using lenses or mirrors |
| Resolution | in microscopes, the ability to form images with fine detail |
| Cell theory | the heory that states that all living things are made up of cells, that cells are the basic units of organisms, that each cell in a multicellular organism has a specific job, and that cells come only form existing cells |
| Cell Membrane | a phospholipid layer that covers a cell's surface and acts as a barrier between the inside of a cell and the cell's environment (made of lipids+ proteins) |
| cytoplasm | the region of the cell within the membrane that includes the fluid, the cytoskeleton, and all of the organelles except the nucleus. |
| cytoskeleton | the cytoplasmic network of protein filaments that plays an essential role in cell movement, shape, and division |
| ribosome | a cell organelle composed of RNA and protein; the site of protein synthesis |
| prokaryote | an organism that consists of a single cell that does not have have a nucleus or cell organelles |
| cell wall | a rigid structure that surrounds the cell membrane and provides support to the cell; mostly in plant cells but also found in some bacteria |
| flagellum flagella) | a long, hairlike structure that grows out of a cell and enables the cell to move ( plural= flagella) Usually if a cell has a flagella, it is associated with water or a watery medium because the flagella enables it to swim |
| eukaryote | an organism made up of cells that have a nucleus enclosed by a membrane, multiple chromosomes, and a mitotic cycle. Includes animals, plants, protists and fungi but NOT bacteria or cyanobacteria |
| nucleus | in eukaryotic cell,a membrane- bound organelles that holds the DNA and that has a role in processes such as growth, metabolism, and reproduction |
| organelle | one of the small bodies found in the cytoplasm of a cell and specialized to perform a specific function |
| cilium (cilia) | a hairlike structure arranged in tightly packaged rows that project from the surface of some cells |
| phospholipid | a lipid that contains phosphorus and that is structural component in cell membranes |
| lipid bilayer | the basic structure of a biological membrane; composed of two layers of phospholipids |
| endoplasmic reticulum | a system of membranes that is found in a cell's cytoplasm and that assists in the production, processing, and transport of proteins and in the production of lipids |
| vesicle | a small cavity or sac that contains materials in a eukaryotic cell; forms when part of the cell membrane surrounds the materials to be taken into the cell or transported within the cell |
| Golgi Apparatus | cell organelle that helps make and package materials to be transported out of the cell |
| lysosome | a cell organelle that contains digestive enzymes |
| mitochondrion | in eukaryotic cells, the cell organelle that is surrounded by two membranes and that is the site of cellular respiration, which produces ATP. The powerhouse. |
| chloroplasts | an organelle found in plant and algae cells where photosynthesis occurs, usually green. |
| central vacuole | a large cavity or sac that is found in plant cells or protozoans and that contains air or partially digested food |
Created by:
CarolineCloninger
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