Abstract
Summary
Hypophysectomy of 433 adult female rats reduced their capacity to survive total body X-irradiation as compared with the response of 542 non-hypophysectomized rats. The 0 to 70% levels of survival were obtained at doses which averaged 157 r lower for hypophysectomized than for non-hypophysectomized rats. At doses ranging from 375 to 500 r the percentage of survival of hypophysectomized rats did not change but remained at about the 80% level. In the absence of the pituitary gland, rats tended to die earlier after irradiation.
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