[DOC] [TLE] Circadian rhythm - Wikipedia [PAR] A circadian rhythm /srkedin/ is any biological process that displays an endogenous, entrainable oscillation of about 24 hours. These 24-hour rhythms are driven by a circadian clock, and they have been widely observed in plants, animals, fungi, and cyanobacteria. [DOC] [TLE] Circadian Rhythms Fact Sheet - National Institute of General ... [PAR] Apr 6, 2016 ... Circadian rhythms are physical, mental and behavioral changes that follow a roughly 24-hour cycle, responding primarily to light and darkness in an organism's environment. They are found in most living things, including animals, plants and many tiny microbes. The study of circadian rhythms is called chronobiology. [DOC] [TLE] Sleep Drive and Your Body Clock - National Sleep Foundation [PAR] Our internal circadian biological clocks, on the other hand, regulate the timing of 
... points of the day, even if we have been awake for hours and our sleep/wake ... 
This shift in teens' circadian rhythm causes them to naturally feel alert later at... [DOC] [TLE] Sleep - How Sleep Works - Circadian Rhythms [PAR] Human circadian rhythms are regulated by an internal biological clock in the 
brain. All animals and plants have a built-in circadian rhythm, which is adjusted 
or ... a few minutes of the Earth's 24-hour rotation cycle (the word circadian 
comes... [DOC] [TLE] Human Biological Clock Set Back an Hour | Harvard Gazette [PAR] Jul 15, 1999 ... Harvard University, reveal that our natural daily rhythm is much closer to ... 
conclude that our internal clocks run on a daily cycle of 24 hours, 11 [DOC] [TLE] Circadian Rhythms, Biological Clock, Chronobiology - Crystalinks [PAR] Circadian rhythms can influence sleep-wake cycles, hormone release, body ... 
The rhythm persists in constant conditions with a period of about 24 hours. ... 
Travel across time zones illustrates the ability of the human biological clock to 
adjust... [DOC] [TLE] Circadian rhythm - Science Daily [PAR] A circadian rhythm is a roughly 24 hour cycle in the physiological processes of 
living beings ... the sleeping and feeding patterns of all animals, including human 
beings. ... Apr. 6, 2008  A newly discovered biological clock, or biological 
rhythm, ... and is based on the circadian rhythm, which is a roughly 24-hour cycle 
that is... [DOC] [TLE] Your Body's Internal Clock and How It Affects Your Overall Health ... [PAR] Mar 20, 2012 ... But the body's clock also affects mood, mental alertness, hunger, ... The most 
basic daily rhythm we live by is the sleep-wake cycle, ... To stay on the 24-hour 
cycle, the brain needs the input of sunlight through the eyes to reset itself each 
day. When humans are allowed to run off their body's clock apart from... [DOC] [TLE] Length of Circadian Cycle in Humans - Circadian Sleep Disorders ... [PAR] Aug 9, 2016 ... The average intrinsic circadian rhythm in patients with delayed sleep ... to light, 
so that it follows the 24-hour light/dark cycle of the Earth's rotation. ... Cromie, 
William J, Human Biological Clock Set Back an Hour (Harvard Univ... [DOC] [TLE] Inside Life Science: How Our Bodies Keep Time - Live Science [PAR] Mar 8, 2011 ... Understanding our internal biological clocks may lead to treatments for obesity, ... 
These roughly 24-hour cycles of physical, mental and behavioral changes are ... 
essential component in directing circadian rhythms in humans, fruit flies, mice, 
fungi and other organisms. ... Circadian Rhythm Affects Memory. [DOC] [TLE] What is Circadian Rhythm / Body Clock? | Sleep.org [PAR] Find out what Circadian Rhythm / Body Clock is and what impact it has on your ... 
Your circadian rhythm (also known as your sleep/wake cycle or body clock) is a ... 
to regulate feelings of sleepiness and wakefulness over a 24-hour period. ... 
which is why humans are most alert while the sun is shining and are ready to 
sleep... [DOC] [TLE] 9 Things You Probably Didn't Know About Your Body's Internal Clock [PAR] Nov 2, 2014 ... Technology has effectively decoupled us from the natural 24-hour ... What we 
found is that natural light-dark cycles provide a strong ... Turns

Question: This "rhythm" is the biological clock in humans, based on a 24-hour cycle
Answer: the circadian rhythm