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31 Cards in this Set
- Front
- Back
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the basic units of living organisms
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Cell
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has a series of lenses that magnify an object in steps.
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compound light microscope
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aims a beam of electrons through a magnetic field to focus them, then through or over the surface of a specimen in a vacuum, and finally onto a screen wear it shows a picture
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electron microscope
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an organism with a cell that lacks internal structers surrounded by membranes.
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procaryote
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an organism with a cell that lacks internal structers surrounded by membranes.
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procaryote
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an organism that has cells containing internal, membrane-bound structures
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eukaryote
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membrane-bound structure
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organelles
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contains the cells DNA
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nucleus
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serves as a boundary between the cell and its external enviroment
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plasma membrane
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a inflexible structure that surrounds the plasma membrane.
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cell wall
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when the cells are ready to reproduce
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chromatin
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a region that produces tiny cell particles that are involved in protein syntheisis
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nucleolus
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the sites where the cell assembles enzymes and other proteins according to the directions of the DNA
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ribosomes
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a clear fluid that is a bit thinner then toothpaste
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cytoplasm
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a folded membrane that forms a network of interconnected compartments inside the cell
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endoplasmic reticulum
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a series of closely stacked, flattened membrane sacs that recieve newly synthizied proteins.
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golgi appartaus
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a sac of fluid surrounded by a membrane
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vacuole
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organelles that contain digestive enzymes, or digest excess or worn out cell parts
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lysosomes
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organelles in which the food molecules are broken down to release energy
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mitochondria
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transforms light energy directly into usable chemical energy and store that energy in food molecules
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choroplasts
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a green pigment that traps eneregy from sunlight and traps it and gives the plants its color.
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CHLOROPHYLL
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a network of thin fibrous elements that act as a sort of scaffold to support for organelles
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cytoskeleton
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thin hollow cylinders made of protein
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microtubules
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thin soldif protein fibers
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microfilaments
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short hair off a plasma membrane
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cilia
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longer projections that move with a whiplike motion
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flagella
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one cell
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unicellular
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more then one cell
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multicellular
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group of cells that perform an activity
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tissue
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two or more tissues that function together
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organ
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a group of organs that work together to carry out major life functions
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organ system
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