Lynch Biology Chapter 7 Key terms set 1
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Created by:
saufdenkamp on January 11, 2012
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12 terms
Terms | Definitions |
|---|---|
 Cell | (biology) the basic structural and functional unit of all organisms |
| Cell Theory | the theory that states that all living things are made up of cells, that cells are the basic units of organisms, that each cell in a multicellular organism has a specific job, and that cells come only from existing cells |
| Plasma Membrane | a special boundary that helps control what enters and leaves the cell |
| Organelles | structures specialized to perform distinct processes within a cell such as protein synthesis and energy transformation. |
| Eukaryotic Cells | contain a nucleus and other organelles that are bound by membranes-also referred to as membrane-bound organelles. |
| Nucleus | a distinct central organelle or a large membrane-enclosed structure that contains the cell's genetic material in the form of DNA |
| Prokaryotic Cell | cell that does not have a nucleus or other membrane-bound organelles |
| Selective Permeability | a process in which a membrane allows some molecules or substances to pass through while keeping others out |
| Phospholipid Bilayer | plasma membrane layers composed of phospholipid molecules arranged with polar heads facing the outside and nonpolar tails facing the inside. |
| Transport Proteins | move needed substances and waste materials through plasma membrane and therefore contribute to the selective permeability of the plasma membrane. |
| Fluid Mosaic Model | a plasma membrane with components constantly in motion, sliding past one another within the lipid bilayer |
| Cytoplasm | semifluid material inside the cell's plasma membrane. |
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