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biology vocab chaoter 3

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Light Microscope
Microscope where light passes through one or more lenses to produce an enlarged image of a specimen
Electron microscope
Forms an image of a speciman using a beam of electrons rather then light
Magnification
The ability to make an image appear larger then actual size
Resolution
Measure of the clarity of an image
Sconning tunneling microscope
Microscope that 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
Cell Theory
The theory that, all living things are made of one or more cells
Cell membrane
Outer boundary of a cell
Cytoplasm
Interier of a cell
Cytoskeleton
System of microscopic fibers in the cell
Ribosomes
Cellular structures on which proteins are made
Prokaryote
Single-celled organism that lacks a nucleus and other internal compartments
Cell wall
Wall surrounding the cell membrane that provides structure and support
Flagella
Long, thread like structures that protude from the cells surface and enable movement
Eukaryote
Organism whose cells have a nucleus
Nucleus
Internal compartment that houses the cells DNA
Organelle
Structure that carries out specific activities in the cell
Cilia
Short hairlike structures that protrude from the surface of some eukaryote cells
Phospholipid
Lipid made of a phosphate group and two fatty acids
Lipid Bilayer
Phospholipids arranged in a double layer
Endoplasmic reticulum
Extensive system of internal membranes that move proteins and after substances through the cell
Vesicle
Small, membrane-bound sac taht transports substances in a cell
Golgi
Set of flattened, membrane-bound sacs that serve as a packaging and distribution center of the cell
Lysosomes
Small, spherical organelles that contain the cells digestive enzymes
Mitochondria
Organelle that harvests energy from organic compounds to make ATP
Chloroplasts
Organells that use light energy to make carbohydrates from carbondioxide and water
Central vacuole
Large, membrane-bound space