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Cancer Cell Growth and Divisio


cancer Cell Growth and Divisio

medium (usually in the form of serum). The organelles, such as mitochondria, must be distributed so that each daughter cell receives an adequate amount to function. In addition, as these tumors grow, some cancer cells can break off and travel to distant places in the body through the blood or the lymph system and form new tumors far from the original tumor. Some of these mutations confer a selective advantage to the cell, such as more rapid growth, and the descendants of a cell bearing such a mutation will consequently become dominant within the tumor population. The behavior of normal (top animation) and cancer cells (bottom animation) with regard to contact inhibition is depicted below.

The result is that the genes responsible for cell division are turned on and the cell divides. Squamous cells also line many other organs, including the stomach, intestines, lungs, bladder, and kidneys. Cancer-causing environmental exposures include substances, such as the chemicals in tobacco smoke, and radiation, such as ultraviolet rays from the sun. Some types of dysplasia may need to be monitored paradox in Mary Shelleys or treated. As we will see, many of the features of cancer cells are due to defects in the genes that control cell division. Cancer: Science and Society, New York:. Tumor cells, in contrast, continue moving after contact with their neighbors, migrating over adjacent cells, and growing in disordered, multilayered patterns. Lymphoma Lymphoma is cancer that begins in lymphocytes (T cells or B cells).


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