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Chapter 4 voc
| Question | Answer |
|---|---|
| Micrograph | a photograph taken through a microscope |
| light microscope | an optical instrument with lenses that retract visible light to magnify images and project them into a viewers eye or onto photographic film |
| Electron Microscope | an instrument that focuses an electron beam through, or onto the surface of a specimen |
| Scanning Electron Microscope | Microscope that uses an electron beam to study the surface architecture of a cell or toher specimen |
| Transmission Electron Micrscope | Microscope that uses an electron beam to study the internal structure of thinly sectioned specimens |
| Cell Theory | The theory that all living things are composed cell and taht all cells come from other cells |
| Plamsa/Cell Membrane | Membrane that sets a cell off from its surrondings and acts as a selective barrier to the passage of ions and molecules into and out of cells |
| Ribosomes | A cell structure consisting of RNA and protein organized ino two subnits and functioning as the site of protein synthesi in the cytoplasm |
| Cell Wall | Protective layer external to the plasma membrane in plant cells,bacteria, fungi, and some protists |
| Pili | A short projection on the surface of a prokaryotic cell that helps the prokaryote attach to other surfaces |
| Flagella | A long cellular appendage specialized for locomation |
| Cilia | A short cellular appendage specialized for locmotion formed from a core of nine outer doublet microtubles and two single microtubles covered by the cell's plasma membrane |
| Cytoplasm | Everything inside a cell between the plasma membrane and the nucleus consists of a semifluid medium and organelle |
| Organelles | A membrane enclosed structure with a specialized function within a cell |
| Cellular Metabolism | The chemical activites of cells |
| Phospholipid | A lipid made up of glycerol joined to two fatty acids and a phosphate group |
| Nucleus | (1) An atoms central core,containing protons and neutrons (2) The genetic control center of a eukaryotic cell |
| Chromatin | The complex of DNA and proteins that constitues eukaryotic chromosomes |
| Chromosomes | A threadlike gene carrying structure found in the nucleus of a eukaryotic cell and most visible during mitosis and meisosis |
| Nuclear Envelope | A double membrane perforated with proes that encloses the nucleus aned seperates it from the rest fo the eukaryotic cell |
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brittbritt1092
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