SCIENCE
CELL BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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metastatsis
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emergence of oncogenes from proto-oncogenes
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exposure to mutagens
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increased cell division
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Detailed explanation-1: -Sometimes, cancer cells can break off from the primary cancer and spread elsewhere in the body. Cancer can then grow in another part of the body. When this happens, this is secondary (metastatic) cancer. Secondary cancer isn’t the same thing as cancer coming back in the same place where it first started.
Detailed explanation-2: -In the anatomic model of metastsis, secondary tumors occur in the organs which they encounter first during their dissemination from the primary tumor. This scenario appears to occur in regional metastases, where tumor cells gain access to nearby tissue or lymph nodes through the blood or lymphatic circulation.
Detailed explanation-3: -Cells from the primary site may break away and spread to other parts of the body. These cells can then grow and form other tumours. These are called secondary cancers or metastases.