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Cancers Essay

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Cancer is the uncontrolled growth of cells due to mutations in the proto-oncogenes and tumor suppressor genes.Unlike normal cells, cancer cells divide even when they do not receive a signal to divide and they can divide indefinitely. In addition, tumors also form as a result of mutations in the proto-oncogenes and tumor suppressor genes. Proto-oncogenes are responsible for regulating the cell cycle but when there is a mutation, it leads to an oncogene, which accelerates cell growth and division. When there is a mutation in the proto-oncogenes, the genes become an oncogene. The oncogenes turn on the signal for division even when it is not suppose to, which causes the cell to continue dividing. This leads to the formation of tumors. Normal tumor suppressor genes proofread the DNA sequences and look for any abnormalities. When there is an error, they trigger apoptosis. The cancer cells send a signal to have the blood vessels come in and deliver nutrients. This is called angiogenesis and this also allows for the cancer cells to be transported to other parts of the body and this is called metastasis. Cancer is th...

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