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15 Cards in this Set

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Cell Theory
All living cells are formed by the division of existing cells
Extracellular Matrix
A dense material often made of protein fibers embedded in a polysaccharide gel
Cytoplasm
Around the nucleus and fills the cells interior. A transparent substance
Organelles
Seperated, recognizable substructures
Plasma Membrane
The external membrane
Internal Membrane
Membranes surrounding organelles
Transmission Electron Microscope
The type of electron microscope used to look at thin sections of tissue
Scanning Electron Microscope
The type of electron microscope that scatters electrons off the sample and is used to look at the surface detail of cells and other structures
Eucaryotes
Organism whose cells have a nucleus
Procaryotes
Organism whose cells do NOT have a nucleus
Nucleus
It is enclosed between a double-membrane nuclear envelope. It contains molecules of DNA
Mitochondria
They appear to be sausage or worm-shaped. The inner membrane is formed into folds that project into the interior of the mitochondria. They contain thier own DNA and reproduce by dividing into two.
Chloroplasts
Large green organelles found in the cells of plants and algae. Possess internal stacks of membranes containg the green pigment chlorophyll. They contain thier own DNA. They evolved by the same means the mitochondria did.
Endoplasmic Reticulum (ER)
An irregular maze of interconnected spaces enclosed by a folded membrane. Most cell membrane components and materials are destined for export.
Golgi Apparatus
Stacks of flattened membrane-enclosed sacs constitute the Golgi. Recieves and modifies molecules from the ER and directs them to the exterior of the cell and other locations.