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15 Cards in this Set
- Front
- Back
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What instrument uses a series of lenses to magnify objects in steps?
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Compound light microscopes
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What are the basic units of life?
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A Cell
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what are the three steps to the cell theory?
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1.All organisms are composed of one or more cells
2. The cell is the basic unit of organization of organisms 3. all cells come from preexisting cells |
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What uses a beam of elctrons instead of natural light to magnify structures up to 500,000 times allowing you to see the structures inside a cell?
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Electron Microscope
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What are the 2 basic cell types?
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Prokaryote and Eukaryotes
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What is a Prokaryote?
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Most unicellular organisms that dont have membrane bound structures.
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What is a Eukaryote?
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Most multicellular organisms that have membrane bound structures
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Membrane bound structures within eukaryotes are what?
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Organelles
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What is the function of a Nucleus?
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To controle the functions of the cell
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What is the boundary between the cell and its environment?
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Plasma membrane
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What is Homeostasis?
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The process of maintaining the cells environment.
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The process in which the plasma membrane of a cell allows some molecules into the cell while keeping others out?
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Selective Permeability
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Lipids with a phosphate group attached to them?
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Phospholipids-they have a glycerol backbone,2 fatty acid chains and a phosphate group.
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Is the head of a phospholipid polar or nonpolar?
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polar-Its attracted to water
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What is special about a fluid mosaic model?
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It's the model of the plasma membrane, it is flexible, create patterns in the plasma membrane.
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