Biology Key Terms p.67
Terms
undefined, object
copy deck
- light passes through one or more lenses to produce an englarged image of a specimen
- light microscope
- forms an image of a specimen using a beam of electrons
- electron microscope
- the ability to make an image appear larger than its actual size
- magnification
- a measure of the clarity of an image
- resolution
- uses a needle-like probe to measure differences in voltage of electrons that leak, or tunnel, from the surface of the object being viewed
- scanning tunneling microscope
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1.all living things are made of one of more cells
2. cells are the basic units of all organisms
3. all cells arise from exsisting cells - cell theory
- outer boundary of a cell
- cell membrane
- cell interior
- cytoplasm
- microscopic fibers that structures are suspended in inside a cell
- cytoskeleton
- cellular structures on which proteins are made
- ribosomes
- single celled organism that lacks a nucleus and other internal compartments
- prokaryotic cell
- surrounds the cell membrane and provides structure and support
- cell wall
- long, threadlike structures that protrude from the cells surface and engages movement
- flagella
- organism whose cells have a nucleus
- eukaryotic cell
- internal component that houses the cells DNA
- nucleus
- structure that carries out specific activites in a cell
- organelle
- short hairlike structures that protrude from eukaryotic cells; propel some cells through envoirnment
- cilia
- lipids made of phosphates group and two fatty acids; has a polar head and 2 nonpolar tails
- phospholipids
- a double layer that the phospholipids are arranged in
- lipid bilayer
- extensive system of internal membranes that move proteins and other substances through the cell
- endoplasmic reticulum
- small, membrane-bound sac that transports substances in cell
- vesicle
- set of flattened, membrane-bound sacs that serves as the packaging and distrubution center of a cell
- golgi apparatus
- small, spherical organelles that contain the cells digestive enzymes
- lysosome
- large, membrane-bound sac that stores water in a cell
- central vacuole
- organelle that harvest energy from organice compounds to make ATP, the main energy source of cells
- mitochondrion