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Chapter 7 bio vocab
| Term | Definition |
|---|---|
| Cell | the basic units of living organisms |
| compound light microscope | use a series of lenses to magnify objects in steps |
| cell theory | made up of 3 main ideas 1. all organisms are composed of one or more cells. 2.the cell is the basic unit of structure and organization of organisms. 3.All cells come from preexisting cells. |
| electron microscope | developed in 1930's and 1940's and uses a beam of electrons instead of light. |
| organelle | a small special structure in every cell |
| prokaryote | cells that don't have a membrane bound organelles |
| eukaryote | cells that contain membrane organelles |
| nucleus | the central membrane bound organelle that manages or controls cellular functions |
| organization | the orderly structure of cells in an organism |
| plasma membrane | provides nutrients such as glucose, amino acids, and lipids to cells |
| selective permeability | a process in which a membrane allows some molecules to pass through while keeping others out. |
| phospholipid | is a replacement if a phosphate group replaces a fatty acid. has a glycerol backbone, two fatty acid chains and a phosphate group |
| fluid mosaic model | a fluid because the phospholipids move within the membrane just as water molecules move with the currents in a lake. |
| transport protein | move needed substances or waste materials through the plasma membrane. |
| ion | a atom or group of atoms with a positive or negative electrical charge. |
Created by:
anthony.goodale