Which of the following is sometimes referred “programmed cell death” because it leads to an organized destruction of the cell?
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Correct Answer: B. Apoptosis
Apoptosis is programmed cell death or the process by which the cell self-destructs. It can be initiated under number of circumstances, such as when the cell has sustained significant damage to its DNA, and is carried out by a cellular cascade pathway. Apoptosis is beneficial to the organism because it can remove cells before the can become cancerous. Immortalization is a situation in which cells continue to divide past the number of times expected for that cell type. This is a common feature of cancer cells. Cellular senescence is a process of cellular aging in which the cell’s telomeres have shortened (through successive cell divisions) to the point that the cell no longer divides. Necrosis is cell death that is caused by some external insult, usually severe, and is not the result of a controlled, biological phenomenon.
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Photo attributed to Rudolf_Schuba.
