Term
| diffusion of water across a selectively permeable membrane; the process stops when all molecules are evenly dispersed |
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Definition
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Term
| water concentration inside the cell is equal to water concentration outside the cell |
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Definition
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Term
| water concentration inside the cell is greater than in the environment |
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Definition
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Term
| water concentration inside the cell is less than that of the environment |
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Definition
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Term
| the cell has the ability to regulate the flow of materials into and out of the cell |
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Definition
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Term
| materials move into and out of the cell by diffusion alone; requires no energy, but it is difficult to maintain and regulate |
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Definition
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Term
| channel proteins allow specific proteins to flow through; carrier proteins act as channel proteins, but change shape to allow certain molecules through. Both work with the concentration gradient and require no energy from the cell |
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Definition
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Term
| a process by which molecules are moved across the concentration gradient. energy from the cell is used to force carrier proteins to work at all times |
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Definition
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Term
| active cells will sometimes feed on other cells |
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Definition
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Term
| the process by which a cell surrounds and takes in material from the environment |
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Definition
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Term
| the expulsion or secretion of materials from the cell |
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Definition
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Term
| removal of wastes from the cell |
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Definition
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Term
| the release of useful products from the cell |
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Definition
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Term
| the process by which one cell divides to produce two genetically identical cells |
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Definition
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Term
| dark structures which contain DNA |
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Definition
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Term
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Definition
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Term
| a genetic copy of the other and forms when chromatin coils |
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Definition
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Term
| a glob of protein which acts as a glue, holding the sister chromatids together |
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Definition
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Term
| the sequence of growth and division of a cell |
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Definition
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Term
| a period in which the cell grows in size and carries out metabolism |
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Definition
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Term
| cell rapidly grows and carries out metabolism; period in which the cell lives and does what it is going to do |
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Definition
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Term
| Dna replicates and begins preparation for cell division |
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Definition
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Term
| centrioles replicate; cell prepares for division |
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Definition
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Term
| cellular contents are divided into two masses separated by a new cell membrane or cell wall |
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Definition
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Term
| two or more different cells working together |
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Definition
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Term
| two or more types of tissues working together to carry out a common function |
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Definition
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Term
| multiple organs working together to support a function |
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Definition
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Term
| the unit produced from the action of all organ systems |
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Definition
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Term
| activate and regulate mitosis |
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Definition
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Term
| a malignant growth resulting from uncontrolled cell division |
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Definition
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Term
| a segment of DNA that controls the production of a protein |
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Definition
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Term
| several harmful compounds have been shown to trigger cancer. Cigarette smoke, polluted air and water, exposure to ultraviolet radiation have all been shown to cause interruptions in the cell cycle. Viral components are also recognized as causing certain types of cancer |
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Definition
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Term
| cancers are characterized by their growth pattern, cell type, and tissue of origin |
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Definition
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Term
| cancer cells which grow rapidly, loose, and are easily dispersed into the circulatory system; rapidly spread and cause multiple small tumors throughout the body |
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Definition
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Term
| cancer cells which grow slowly, are tightly packed, and are concentrated in a single mass; masses apply pressure and/ or tear healthy tissues |
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Definition
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