Related topics: circadian rhythms

The sun may have a dual personality, simulations suggest

Researchers at CU Boulder have discovered hints that humanity's favorite star may have a dual personality, with intriguing discrepancies in its magnetic fields that could hold clues to the sun's own "internal clock."

Our circadian clock sets the rhythm for our cells' powerhouses

Countless genetically controlled clocks keep time in different body parts, such as the liver, kidneys and heart. Among other things, they initiate metabolic processes, ensuring that these occur at the optimal time of day. ...

The circadian clock sets the pace of plant growth

Researchers at the Centre for Research in Agricultural Genomics (CRAG) have discovered that the members of a protein family associated with the internal clocks of plants act sequentially to limit plant growth until the end ...

US body clock geneticists take 2017 Nobel Medicine Prize

US geneticists Jeffrey C. Hall, Michael Rosbash and Michael W. Young were awarded the Nobel Medicine Prize Monday for shedding light on the biological clock that governs the sleep-wake cycles of most living things.

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Circadian rhythm

A circadian rhythm is a roughly-24-hour cycle in the biochemical, physiological or behavioral processes of living entities, including plants, animals, fungi and cyanobacteria (see bacterial circadian rhythms). The term "circadian", coined by Franz Halberg, comes from the Latin circa, "around," and diem or dies, "day", meaning literally "approximately one day." The formal study of biological temporal rhythms such as daily, tidal, weekly, seasonal, and annual rhythms, is called chronobiology.

Circadian rhythms are endogenously generated, and can be entrained by external cues, called Zeitgebers, the primary one of which is daylight. These rhythms allow organisms to anticipate and prepare for precise and regular environmental changes.

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