Ch 18 cancer – Flashcards
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Molecular treatment for cancer include efforts to inactivate onconogens
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True
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MRI is an imaging technique thst can detect tumors without exposing the patient to radiation
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True
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A substantial increase in the rate of cell division is called dysplasia
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False
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Radiation is a major contribution to the development of cancer
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False
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Leukemia is cancer of the blood forming organs
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True
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Beigne tumors never threaten health
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False
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Free radicals are reactive molecular fragments ghat may damage DNA
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True
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Suppression of the immune system by factors such as illness or stress can contribute to the development of cancer
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True
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Malignant tumors may metastasize whereas benign tumors do not
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True
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A single oncogene is usually involved in the development of a cancer
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False
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Chemotherapy that inhibit cell division acts primarily on cancer cells
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True
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Free radicals produced during biochemical reactions can serve as carcinogens if they are neutralized by
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Antioxidants
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Cancers that metastasize and invade normal tissue to impede their functions are called
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Malignant tumors
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Which of the following is true regarding chemo
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This procedure kills cancer cells and normal cells that divide rapidly
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Tumor suppressor genes function to increase the activity of cells during times of stress or when conditions do not favor cell division
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False
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How are antiangiogenic drugs used in the treatment of cancer
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These drugs stop the growth of blood vessels into the tumor so the cells starve to death
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A mutated form of the p53 gene has been identified in tumors of all the following types of cancer EXCEPT
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Stomach
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The dietary carcinogen aflatoxin can be found in
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Raw peanut butter
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Tumor suppressor genes function to
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Slow down unchecked cell growth differentiation division of adhesion
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Common side effects associated with chemo are due to
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Death of normal cells caused by the chemicals
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Tobacco is a carcinogen because it has been linked to the induction of cancer in
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All of these
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The most important aspect in the treatment of cancer is that cancer be diagnosed as early as possible
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True
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Which type of the following viruses does not contribute to cancer
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None
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Which of the following is NOT a true statement regarding cancer diagnosis
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Early diagnosis of a cancer allows time for physicians to administer medication that transforms onconogenes into tumor suppressor genes
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Which of the following is NOT true regarding cervical cancer
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The risk of developing cervical cancer increases with infection by the herpes simplex virus
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Which of the following does NOT describe actinic keratosis
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An example of an extremely rare form of liver cancer
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When a tumor remains in one location it is referred to as
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In situ cancer
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Not only does smoking cause lung cancer it also doubles the risk of which
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Bladder
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A mass of rapidly dividing cells that have potentially lost the ability to regulate cell division is
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Neoplasm
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Cells of a malignant tumor differ from those of an in situ tumor in that cells of the malignant tumor have lost regulatory control and don't
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False
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How does Porto oncogene differ from an oncogene
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Porto co control normal cell division oncogenes contribute to the development of cancer
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The p53 gene
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Codes for a protein that prevents damaged cells from dividing
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Dysplasia occurs when an abnormal structural change occurs in a cell
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True
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If angiogenesis were not to occur a tumor would reach the size of ________ and stop growing
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Pea
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The chance that an individual in the US will experience some form of cancer in their lifetime is
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1 in 3
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A diet high in red meat and saturated fat increase the risk for _____ cancer
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Colon rectum and prostate
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Telomerase is an enzyme characteristics of normal cells that is active in DNA repair
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False
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Damage to ______ greatly reduces a cells ability to repair DNA during DNA replication
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Mutator genes
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Any factor that can contribute to the conversion of a healthy cell in to a cancerous one is known as
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Carcinogen
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Which enzyme is potentially useful indicator of certain types of cancers
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Telomerase
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When hyperplasia signal a loss of control of cell division it always results in cancer
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False
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Which of the following types of cancer kills the highest % of people
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Lung
