PracticeExam01Steven-REVISED

C based on discussions in class and evidence from the

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C: Based on discussions in class and evidence from the text, we can deduce that the incidence of cancer is highly correlated with the number of cigarettes smokes per day, that is to say that as one increases the number of cigarettes consumed there is a higher occurrence of cancer. Although this is true, it is unfortunate that we cannot deduce any evidence of smoking affecting life expectancy because the remission rates for epithelial lung cancer is very high and there a wide variety of treatment options. D: All of the above. Q3: Of the following choices, which is a false statement? A: Tumors arise from cells that were once in “normal” tissue, tissue that has lost its ability to assemble and regulate itself. Based on this information we know that when classifying cancer, it is based on both tissue type and cancer aggressiveness. That is to say, that if colon cancer metastasized to the liver then, when discovered, the liver cancer would classified as a type of liver cancer. B: Tumors arise from many specialized cell types throughout the body and can include muscle, fat (adipose) or bone tissue; but the most prevalent type of cancers deal with epithelial cells (almost 90%). The epithelia is best described as a sheet-like lining that binds the cells, providing strength and mobility to the tissue itself. C: Concerning the nature of cancer, we know that cancerous growths are solely due to the reactivation of previously inactivated genes. Possibilities such as gene alterations and/or
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