| 期刊全称 | Biochemical Responses to Environmental Stress | | 期刊简称 | Proceedings of a Sym | | 影响因子2023 | I. A. Bernstein (Professor of Environmental and In | | 视频video | | | 图书封面 |  | | 影响因子 | In the world outside the laboratory, life goes on in a chang ing rather than in a constant environment and organisms must continually accommodate to changes in temperature, light, humidity, nutrition, etc. Since studies of the enzymatic process, in vitro, indicate that, in general, biological catalysis can proceed only over limited ranges of temperature, pH, substrate concentration, etc. , it seems reasonable to assume that biological systems have an ability to maintain a relatively constant internal milieu in the face of drastic external environmental change. This concept, as applied particularly to the mammal, was enun ciated by Bernard (1878) in the latter part of the last century. Cannon (1939) designated the phenomenon as homeostasis stating (cf Potter, 1970) that "in an open system such as our bodies represent, compounded of unstable material and subjected continually to disturbing conditions, constancy is in itself evidence that agencies are acting or are ready to act, to maintain this constancy. " He further proposed that "if a state remains steady, it does so because any tendency towards change is automatically met by increased effectiveness of the factor or factors whic | | Pindex | Conference proceedings 1971 |
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发表于 2025-3-21 16:36:27
