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Radiosensitivity is the relative susceptibility of cells, tissues, organs or organisms to the harmful effect of ionizing radiation. Cells types affected [ edit ]
Another important observation is that oxygen must be present at irradiation or within milliseconds afterward for the oxygen effect to take place. [ 8 ] The best known explanation of the oxygen effect is the oxygen fixation hypothesis developed by Alexander in 1962, [ 9 ] which posited that radiation-induced non-restorable or "fixed" nuclear DNA ...
Conventional chemotherapeutics are currently being used in conjunction with radiation therapy to increase its effectiveness. Examples include the fluoropyrimidines, gemcitabine and platinum analogs; fluoropyrimidines increase sensitivity by dysregulating S-phase cell cycle checkpoints in tumor cells.
It is important to distinguish the radiosensitivity of a particular tumor, which to some extent is a laboratory measure, from the radiation "curability" of a cancer in actual clinical practice. For example, leukemias are not generally curable with radiation therapy, because they are disseminated through the body.
Reflecting on the Benefits of Exercise. Ingraham says that her goal is to be fit enough to do activities with her friends and family. “I love being able to do an adventurous walk during vacation ...
The endocrine system is a complex network of glands and organs that produce and release hormones which control many of our body’s basic functions, such as metabolism, growth and reproduction.
A specific type of body fat — visceral fat — around the midsection has been linked to the abnormal proteins that develop in the brain and are a hallmark of Alzheimer’s, according to findings ...
Body shape has effects on body posture [29] and gait, and has a major role in physical attraction. This is because a body's shape implies an individual's hormone levels during puberty, which implies fertility, and it also indicates current levels of sex hormones. [1] A pleasing shape also implies good health and fitness of the body. Posture ...