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circadian rhythm |
Also found in: Medical, Wikipedia, Hutchinson | 0.04 sec. |
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circadian rhythm: see rhythm, biological rhythm, biological, cyclic pattern of physiological changes or changes in activity in living organisms, most often synchronized with daily, monthly, or annual cyclical changes in the environment. ..... Click the link for more information. . circadian rhythmInherent cycle of approximately 24 hours in length that appears to control or initiate various biological processes, including sleep, wakefulness, and digestive and hormonal activity. The natural signal for the circadian pattern is the change from darkness to light. The controlling mechanism for these cyclic processes within the body is thought to be the hypothalamus. Any change in the circadian cycle (such as jet lag and other conditions associated with travel) requires a certain period for readjustment. |
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| In several groups of genes, such as those for circadian rhythms, the honeybee looks more like a vertebrate than the other sequenced insects. Experts in circadian rhythms say they're biological, emanating from an internal clock that dictates everything from when we sleep to when we're most productive at work. Circadian rhythms, your 24-hour biological cycle, influence physical performance. |
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Circadian rhythms
