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16 Cards in this Set
- Front
- Back
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Nucleus |
Central portion of a cell containing organelles and other components. |
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Organelles |
Structures within nucleus that carry out necessary biological processes. |
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Prokaryotic cells |
Cells that contain no nucleus, do not contain organelles. Usually single celled organisms. |
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Eukaryotic cells |
Contains a nucleus and organelles. Type of cells found in humans. |
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Cell membrane |
Composed of two layers of phospholipids, referred to as lipid bilayer. |
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Cytoplasm |
Also referred to as cytosol, fills the inside of cells and consists of water, salts, organic molecules, and many enzymes. |
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Intracellular fluid |
The water component of cytoplasm. |
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Linkers |
Protein that attaches membrane to cytoskeleton. Allows cell to maintain shape. |
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Enzymes |
Protein that carry out different steps of metabolic reactions that take place near membrane. |
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Receptors |
Protein that acts as a messenger. Signals cell to start or stop a metabolic activity. |
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Transporters |
Protein that makes membrane semi permeable. Controls movement of substances in and out of cell. |
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Simple diffusion |
Random movement from region of high to region of low concentration. |
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Facilitated diffusion |
Movement from region of high to region of low concentration with the aid of a carrier or channel protein. |
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Osmosis |
Movement of water from a region of high water to low water concentration. |
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Active transport |
Movement from region of high to region of low concentration with the aid of a carrier or channel protein and energy, usually ATP. |
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Endocytosis |
Materials are engulfed by the plasma membrane and drawn into cell in a vesicle. |
