Chronobiology - Wikipedia, the free encyclopedia
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Chronobiology is a field of science that examines periodic (cyclic) phenomena in living organisms and their adaptation to solar and lunar related rhythms. These cycles are known as biological rhythm...
en.wikipedia.org/wiki/Chronobiology
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The biological clock is linked with circadian rhythm, which is a roughly-24-hour cycle in the physiological processes of living beings, including plants, animals, fungi and cyanobacteria. ... The circadian "clock" in mammals is located in the suprachiasmatic nucleus (SCN), a distinct group of cells located in the...
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www.crystalinks.com/biologicalclock.html
www.crystalinks.com/biologicalclock.html
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A person's circadian rhythm is an internal biological clock that regulates a variety of biological processes according to an approximate 24-hour period. Most of a person's body systems demonstrate circadian ... ... The malfunctioning of a person's circadian system, or biological clock, causes circadian rhythm disorders.
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www.emedicinehealth.com/sleeplessness_and_circadian_rhy...
www.emedicinehealth.com/sleeplessness_and_circadian_rhythm_disorder/article_em.htm
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Living organisms evolved an internal biological clock, called the Circadian rhythm, to help their bodies adapt to the daily cycle of day and night (light and dark) as the Earth rotates every 24 hours. The term 'circadian' comes from the Latin words for about (circa) a day (diem).
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learn.genetics.utah.edu/content/begin/DNA/clockgenes/
learn.genetics.utah.edu/content/begin/DNA/clockgenes/
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The mechanism of the circadian clocks had been difficult to determine, until the identification of circadian rhythm mutants and their cognate genes in Drosophila, Neurospora and now in ... In plants, the circadian clock regulates about 5% of the genome (>1000 genes in Arabidopsis). ... Biological Rhythm Research...
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template.bio.warwick.ac.uk/Staff/amillar/circad.html
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No, but they are related. Our biological clocks drive our circadian rhythms. ... Circadian rhythms are important in determining human sleep patterns. The body’s master clock, or SCN, controls the production of melatonin, a hormone that makes you sleepy. ... How does circadian rhythm research contribute to human health?
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www.nigms.nih.gov/Publications/Factsheet_CircadianRhyth...
www.nigms.nih.gov/Publications/Factsheet_CircadianRhythms.htm
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The circadian rhythm refers to the endogenous internal clock controlling many biological functions having a periodicity of about “circa” a day “dies” – free-running rhythms observed show that, without external influence, the natural free running cycle (see graph below) is slightly over 24 hours.
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www.portfolio.mvm.ed.ac.uk/studentwebs/session3/31/circ...
www.portfolio.mvm.ed.ac.uk/studentwebs/session3/31/circadianrhythm.htm
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The cellular location and rhythmic expression of Period 1 (Per1) circadian clock gene were examined in the retina of a Per1::GFP transgenic mouse. Mouse Per1 (mPer1) RNA was localized to inner nuclear and ganglion cell layers but was absent in the outer nuclear (photoreceptor) layer.
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www.medscape.com/medline/abstract/12930806
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The Medscape Journal ... Biological Clocks [physiology] ... Circadian Rhythm [physiology]
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www.medscape.com/medline/abstract/16780050
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