(Biology) the branch of biology concerned with the periodicity occurring in living organisms. See alsobiological clock,circadian ˌchronobiˈologistn Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 20...
The body's circadian clock-the biological clock that organizes bodily activities over a 24-hour period-contributes to normal variations in blood pressure and heart function over the course of the day. In most healthy humans, blood pressure dips(下降)at night. People who do not experience this ...
A circadian rhythm is any biological process that displays an endogenous, entrainable oscillation of about 24 hours. These rhythms are driven by a circadian clock, and rhythms have been widely observed in plants, animals, fungi and cyanobacteria. The term circadian comes from the Latin circa, mea...
Explore circadian rhythms: your body's 24-hour clock influencing sleep, energy, and health. Learn its importance and how to maintain its balance. In the grand orchestra that is our bodies, there’s a conductor orchestrating a rhythmic masterpiece – it’s called your circadian rhythm. These ...
Meal plays an important role in lowering saliva ghrelin concentration in humans. However, present data did not exclude whether the circadian changes in saliva ghrelin expression were regulated by the biological clock or by food intake.doi:10.1080/09291010600576860...
rhythm, biological,orbiorhythm,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. The exact nature of the internal mechanism, or “biological clock,” that controls such rhythms...
Humans and other animals keep time via an internalbiological clockknown as the circadian rhythm, which regulates 24-hour cycles of sleep, eating, and other activities.───人和其它动物凭借体内生物钟和着被称为昼夜节律的拍子,这种节律调节睡眠、饮食和其他24小时周期的活动。
Circadian rhythms are biological rhythms that are governed by the biological clock.Biological Rhythms The cyclical activity of an animal is a biological rhythm. These biological rhythms are run by an internal biological clock. The body has many different biological rhythms that develop as part of ...
Human beings’ sleep cycle is a circadian rhythm, a system based on the twenty-four hour day. In the circadian rhythm most humans sleep at night. When people travel to different time zones their biological clocks have to adjust. In humans, the biological clock is in a group of cells ...
darkness can reset an animal's circadian rhythm. Normally, internal rhythms are kept in step by regular environmental cycles. For instance, if a homing pigeon is to navigate with its Sun compass, its clock must be properly set by cues provided by the daylight/darkness cycle....