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IGHS Winkels
Biology Chapter 10
| Term | Definition |
|---|---|
| Cell division | the process by which a cell divides into two new daughter cells |
| Mitosis | the first stage, division of the cell nucleus |
| Cytokinesis | the second stage,division of the cytoplasm |
| Chromatids | each chromosome consists of these two identical "sisters" after each chromosome is replicated, or copied |
| Centromeres | where each pair of chromatids is attached |
| Interphase | "in-between" period of growth in cell division/DNA is replicated/the cell grows |
| Cell cycle | is the series of events that cells go through as they grow and divide |
| Prophase | the first and longest phase of mitosis/the chromosomes become visible |
| Centrioles | two tiny structures located in the cytoplasm near the nuclear envelope |
| Spindle | a fanlike microtubule structure that helps separate the chromosomes |
| Metaphase | the second phase of mitosis/the chromosomes line up across the center of the cell |
| Anaphase | the third phase/the centromeres that join the sister chromatids split, allowing the sisters to become individual chromosomes |
| Telophase | the fourth and final phase/the chromosomes begin to disperse into a tangle of dense material |
| Cyclin | regulates the cell cycle |
| Cancer | a disorder in which some of the body's own cells lose the ability to control growth |
| As a cell becomes larger | volume increases faster than its surface area |
| As a cell grows, it | places more demand on its DNA/uses up food and oxygen more quickly |
| Problems that growth causes for cells | DNA overload/Expelling waste |
| If a cell's DNA were not copied before cell division, the cell could | be stopped from dividing by cyclins |
| When a cell divides | each daughter cell receives its own copy of the parent cell's DNA |
| Phases of mitosis | Interphase, prophase, metaphase, anaphase, telophase |
| Plant cells | have a cell plate |
| Contact with other cells | can stop cell from growing |
| In eukaryote cells, the timing of the cell cycle is regulated by | Cyclins |
| Cancer cells form masses of cells called | Tumors |