Circadian rhythm
hideA 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.
For more information about Circadian rhythm, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
News tagged with internal clock
Research describes connections between Circadian and metabolic systems
Nov 17, 2009 |
not rated yet |
0
(PhysOrg.com) -- A paper by University of Notre Dame biologist Giles Duffield and a team of researchers offers new insights into a gene that plays a key role in modulating the body’s Circadian system and may ...
Researchers use math to reduce jet lag
Jun 18, 2009 |
not rated yet |
0
Reducing jet lag is the aim of a new mathematical methodology and software program developed by researchers at Brigham and Women's Hospital and the University of Michigan.
MicroRNAs grease the cell's circadian clockwork
May 31, 2009 |
not rated yet |
0
Most of our cells possess an internal clock, a group of genes displaying a cyclic expression pattern that reaches a peak once a day. A large number of circadian genes are expressed by organs such as the liver, whose activity ...
Genetic basis for migration
Mar 31, 2009 |
4 / 5 (1) |
0
Scientists studying Eastern North American monarch butterflies (Danaus plexippus) have uncovered a suite of genes that may be involved in driving the butterflies to migrate towards Mexico for the winter. Their research, publis ...
Paper sheds new 'light' on fascinating rhythms of the circadian clock
Biology /
Feb 16, 2009 |
4.6 / 5 (7) |
0
(PhysOrg.com) -- Scientists have long known that interrupting the 24-hour circadian rhythm plays havoc with the lives and health of medical, military and airline personnel, factory employees and travelers.
Stop counting sheep (and hitting snooze)
Jan 19, 2009 |
3.8 / 5 (4) |
2
WAKE UP
If you're lucky, you're still sleeping when it's "time to make the doughnuts."
