Ch. 3 Cell Structure
About this set
Created by:
Jowens12golf on June 6, 2012
Subjects:
Log in to favorite or report as inappropriate.
Order by
16 terms
Terms | Definitions |
|---|---|
 Light Microscope and Electron Microscope | Look to chapter 1 notes |
| Transmission electron microscope | An electron beam is directed at a very thin slice of specimen stained with metal ions. Can reveal a cell's internal structure with fine detail. |
| Scanning Electron Microscope | An electron beam is focused on a specimen coated with a thin layer of metal. shows 3D images of cell surfaces. |
| Scanning Tunneling Microscope | Uses a needle-like probe to measure differences in voltage caused by electrons that leak, or tunnel, from the surface of the object being viewed. Objects as small as individual atoms can be viewed. |
| Resolution | A measure of the clarity of an image. |
| Magnification | The quality of making an image appear larger than its actual size. |
| The Cell Theory | All living things are made up of one or more cells. All cells come from existing cells. Cells are the basic units of structure and function in organisms. |
| Cell Membrane | Encloses the cell and separates the cell interior from its surroundings. It regulates what enters and leaves the cell. Made of a lipid bilayer with a phosphate head and fatty acid tails. |
| Nucleus | Houses the DNA and controls the functions of a cell. Has a nuclear membrane and a nucleolus. |
| Endoplasmic Reticulum | An extensive system of internal membranes that move proteins and other substances through the cell. Rough ER has ribosomes on it. Smooth ER doesn't have ribosomes on it. |
| Golgi Apparatus | A set of flattened, membrane bound sacs that serves as the packaging and distribution center of the cell. |
| Lysosomes | Small spherical organelles that contain the cell's digestive enzymes. |
| Mitochondria | Harvests energy from organic compounds to make ATP, the main energy currency of cells. Has an inner and outer membrane. |
| Chloroplasts | The mitochondria of plant cells. Use light energy to make carbs from carbon dioxide and water. Same structure and function of mitochondria. |
| Central Vacuole | stores water and may contain many substances including ions nutrients and wastes. |
| Cell Wall | A thick wall that surrounds the cell membrane composed of proteins and carbs, including the polysaccharide cellulose. Helps support and maintain the shape of the cell, protects it from damage, and connects it with adjacent cells. |
First Time Here?
Welcome to Quizlet, a fun, free place to study. Try these flashcards, find others to study, or make your own.