QUESTION 1 Cancerous tumors are benign tumors that do not invade nearby tissues. True False QUESTION 2 Cancer- causing environmental exposures include substances, such as the chemicals intobacco smoke; and radiation, such as ultraviolet rays from the sun. True False QUESTION 3 Cancer mortality is higher among women than men. True False
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Cancerous tumors are malignant, not benign. They have the ability to invade nearby tissues and spread to other parts of the body. Show more…
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Most human cancers $a$. are caused by viruses. b. are in blood cells or their precursors. $c .$ involve mutations of somatic cells. $d$. spread through solid tissues rather than by the blood or lymphatic system. $e .$ are inherited.
Which of the following statements is false regarding cancer risk factors? a. The presence of one oncogen will produce cancer. b. Smoking tobacco is the main cause of lung cancer. c. An unbalanced diet is an important risk factor. d. Only genetic and environmental factors cause cancer.
Which of the following statements about tumors is incorrect? a) Benign tumors pose less of a health risk than do malignant tumors. b) Malignant tumors shed cancer cells that can spread to other parts of the body. c) Tumors are caused by excessive cell growth and division. d) Cancer cells from malignant tumors can travel to other parts of the body in a process called metastasis. e) They contain cells with abnormally high contact inhibition.
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