2nccu.blackb QUESTION 1 Intravasation is the movement of cancer cells from the p

Question

2nccu.blackb QUESTION 1 Intravasation is the movement of cancer cells from the primary site O Into blood vessels O Into lymphatic vessels. OInto distant organs. A and B. None of the above. QUESTION 2 The growth of microscopic metastases into macroscopic masses is known as O Invasion O Colonization Intravasation Extravasation None of the above. QUESTION 3 The ability for cancer cells to form a secondary tumor at a site distant from the primary tumor Is acquired along with the ability to move through circulation Is possessed by the majority of cells in a tumor Is often acquired after micrometastases have been established. Usually occurs prior to establishment of micrometastases None of the above. Ciek Save and Submit to save and submit. Click Save All Answers to save all answers

Explanation / Answer

1. Intravasation is the movement of cancer cells into blood stream. The cancer cells move from their primary site into blood and the bloodstream. This movement is required for metastasis that results in formation of tumors in secondary sites.

Right option is A and B.

2. Cancer cells grow in a primary tumor by suppressing the tissues immune surveillance. Cancer cells are motile and invasive. Hence, they move from their primary site into the blood stream. Although most cells are killed, a few of them survive, colonizes, and develop tumors in distant organs. This is known as organ colonization.

Right option is Colonization

3. The ability of cancer cells to form secondary tumors that are away from the primary site is known as metastasis. Metastasis ability is acquired after micrometastasis is established. Micrometastasis is the initial formation of small tumors that are not visible. Not all tumors metastasize.

Right option is “is often acquired after micrometastasis has been established”.

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