CELL STRUCTURES AND FUNCTION
CELL DIVISION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The original site of cancer growth, benign, not harmful
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The movement of cancerous cells form the original site
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The growth of tumors at new sites after metastasis, harmful
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None of the above
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Detailed explanation-1: -The spread of cancer cells from the place where they first formed to another part of the body. In metastasis, cancer cells break away from the original (primary) tumor, travel through the blood or lymph system, and form a new tumor in other organs or tissues of the body.
Detailed explanation-2: -The place where a cancer starts in the body is called the primary cancer or primary site. 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.
Detailed explanation-3: -Metastasis is ability of cancer cells to spread from one organ or part of the body to another. Cancer cells migrate through blood or lymph pathway and invade other tissues and form new tumors. The process is termed as metastasis. It is the property of malignant tumor.
Detailed explanation-4: -The EMT posits that metastatic cells arise from either epithelial stem cells or differentiated epithelial cells through a step-wise accumulation of gene mutations that eventually transform the epithelial cell into a tumor cell with mesenchymal features.