SC Medical Chronobiology
Chronobiology studies the temporal aspects of life on earth. We are especially interested in endogenous strategies to cope with the common, highly predictable alterations in the atmosphere that are due to the rotation of the earth. The daily cycles in light and darkness, in turn, create alterations in temperature and humidity, making a challenge to primitive and complicated organisms alike. Microbes, animals and plants all have pronounced every day rhythms from the level of gene expression to behaviour. The observation that these rhythms normally persist in constant circumstances led to the characterization of a day-to-day biological oscillator, from time to time referred to as a circadian clock, that serves to coordinate physiology at the level of the cell as nicely as in entire animals. Our circadian systems control our lives!
Chronobiology is a field of biology that examines periodic (cyclic) phenomena in living organisms and their adaptation to solar- and lunar-related rhythms.These cycles are recognized as biological rhythms. Chronobiology comes from the ancient Greek chronos, which means "time", and biology, which pertains to the study, or science, of life. The related terms chronomics and chronome have been made use of in some cases to describe either the molecular mechanisms involved in chronobiological phenomena or the extra quantitative aspects of chronobiology, particularly where comparison of cycles among organisms is required.
Chronobiological studies contain but are not restricted to comparative anatomy, physiology, genetics, molecular biology and behavior of organisms within biological rhythms mechanics. Other aspects involve development, reproduction, ecology and evolution.
There are traditionally 3 approaches to research and teaching of physiology: biochemical, energetic, and homeostatic. The 3 are by no indicates exclusive and all superior physiologists will involve all 3 in their perform and teaching, but every with a distinctive emphasis.
Biochemical method is common of human/medical physiology. Physiological mechanisms are described at lower and lower levels, until the molecules involved are all described. This is most unquestionably a valuable approach and has fantastic practical application as nicely, however it has its drawbacks. Very first, it ignores evolution (it can even be accomplished by a Creationist) which might possibly lead 1 to miss the huge picture, thus guidance in which direction will research be most productive. Second, it offers a excellent description, but not an explanation of the mechanisms. It answers the question How some thing functions, but does not attempt at all to answer Why.
Energetic approach is based on the notion of symmorphosis, i.e., that physiological adaptations are optimal in an engineering sense, especially in their utilization of power. All physiological processes are noticed through the lense of energetics: how is energy acquired, stored, applied, recycled and dissipated by the organism. Some heavy-duty economics formulas and models have been modified for use in physiology more than the past century or so. It is assumed that every mutation that leads to superior energetic efficiency of the organism will be preserved by organic choice. This may possibly or may well not be correct, but as a working hypothesis, it is mightily potent. This method is mainly seen in comparative/ecological/evolutionary physiology courses and textbooks and it is alot more geared towards answering the Why than the How questions.
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Homeostatic strategy has lately gone out of favor, for a quantity of reasons, mainly due to its inefficiency as a generator of actual scientific progress. Physiological processes are seen as mechanisms for the maintanance of all aspects of the internal milieu of the physique (first discussed in this way by Claude Bernard in the late 19th century). Environmental events tend to move numerous biological constants away from their optimal values, and several physiological mechanisms "kick in" to counter these perturbations and return all values back to regular.
