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Nt1310 Unit 1

explanatory Essay
444 words
444 words
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1. Why do cells need to communicate? Cells need to communicate in order to have tasks and duties be completed. They receive stimuli and response, if necessary, in order for the organism to function and live. In addition, cells can work together and function as a group or system instead of individually through communication to increase the organism’s efficiency. 2. Explain what happens during the three phases of signal transduction. Firstly, the three phases of signal transduction are reception, transduction, and then response. In the beginning phase: reception, a protein in the plasma membrane binds to a signaling molecule. The next phase, transduction, the binding from the previous phase the signal is transduced(converted) to different …show more content…

In this essay, the author

  • Explains that cells need to communicate in order to have tasks and duties completed. they receive stimuli and response, if necessary, for the organism to function and live.
  • Explains the three phases of signal transduction, which are reception, transduction, and then response.
  • Explains that second messengers aid signaling pathways like the first signal molecules but later on in the transduction phase. they are usually small, water soluble and non-protein molecules or ions.
  • Describes the following phenomena, identifies the organisms they occur in, and explains how cellular signaling is used in each.
  • Explains quorum sensing, which is the act of bacterial cells identifying the amount of other bacteria cells around them. cellular signaling is used because small molecules are secreted and bind to receptor proteins on the cells.
  • Explains that yeast also has signal molecules released depending on the sex to help the other cells know which to mate with. cells secrete factors which bind to alpha cells by attaching to receptor proteins on their plasma membrane.
  • Explains that cellular signaling pathways and mechanisms are universal among all domains because it originates from a common ancestor.

Cellular signaling is used because in order to do the latter, small molecules, also considered, signal molecules are secreted and they bind to receptor proteins on the cells to help determine the density of bacteria cells. b. Mating in Yeast Yeast also has signal molecules released depending on the sex to help the other cells know which to mate with, a cells mate with alpha cells and not with each other. a cells secrete a factors (signal molecules) which bind to alpha cells by attaching to their receptor proteins on their plasma membrane. Also, the vis versa occurs in alpha cells. c. Apoptosis Apoptosis is when a cell commits suicide because it is either damaged or done with its life. Specific signals can activate caspases and cause the cell to shrink, lobe, and digested by special scavenger cells. One example is pore formation in the mitochondrial membrane that leads to apoptosis. 6. Why do you think cellular signaling pathways and mechanisms are so universal among life’s domains? Cellular signaling pathways and mechanisms are so universal among all domains because it originates from a common ancestor(it is a way for the organism to regulate cell activity). This characteristic is advantageous for survival so it is part of evolution and passed

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