BPS 1101 Lecture Notes - Lecture 5: Isotopes Of Polonium, Programmed Cell Death, Chemotherapy
16 May 2016
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Document Summary
Cancer is an uncontrolled growth (hyper-proliferative lesion) - benign sometimes will stop after a certain time. A wart grows to a certain size and then stops. Benign lesions can be fatal in developing countries. Consumes so much of the resources in the body so other places can"t grow. Cancer death rate by age increases after 55 yrs. The death rates in us between 1950 + 2001. Cancer ----> does not change much (have not been able to x the problem) -> do not take precautions against potential cancer causes. Due to a change in infection rates. Some cells divide more (wbc) and others divide less (nerve cells) If a cell gets detached it won"t create a new organ. Cancer cells divide continuously (do not obey normal rules) cancer cells are immortal. Hela cells from henrietta lacks in 1957. Malignant cells are often mobile (cancers move around the body) Makes it more dif cult to kill them.
