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Unit 4
| Question | Answer |
|---|---|
| Target Cell | Any cell that has a specufic receptor for an antigen or antibady or hormone or drug, or is the focus of contact by a virus |
| Ligand | A molecule that binds specifically to another molecule, usually a larger one |
| Phosphorylation | A biochemical process that involves the addition of phasphate to an organic compound. |
| Receptor Protein | Receotir proteins embedded in the cell membrane and are meant to recognixe and bind to specific substances |
| Secondary messenger | Second messengers are molecules that relay signals recieved at receptors on the cell surgace and they serve to amplify |
| Signal amplification | The amplification of signals, defined as an increase in the intensity of a signal through networks of intracellular reaction. |
| Response | In cellular communication, the change in a specifica cellular activity brough about by a transduced signal from outside |
| Feedback | A method of metabolic control n which the end product slows the process |
| Positive Feedback | A form of regulation in which an end product of a process speed s up that process |
| Asexual Reproduction | The generation of offspring from a single parent that occures without the fusion of gametes. |
| Cell cycle | Cell cycle: A cyclically operation set of molecules in the eukaryotic cell that both triggers and coordinates with key events |
| Interphase | The period in the cell cycle whn the cell is not dividing, during interphase, cellular metabolic activity is high |
| Mitosis | A process of nuclear division in eukaryotic cells coventionally divided into five stages |
| Cancer | An abnormal groeth of cells which tend to proliferate in an uncontrolled wat, and in some cases metastsized |
| Cyclin | A cellular protein that occurs in a cyclically fluctuating concentration and that plats an important role in regulating |