Biologische Uhr
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<timefyi-glossary slug="biological-clock"></timefyi-glossary>Definition
Der interne molekulare Mechanismus in lebenden Organismen, der rhythmische Schwingungen erzeugt, die etwa dem 24-Stunden-Tag entsprechen. Bei Säugetieren befindet sich die Hauptuhr im suprachiasmatischen Kern (SCN) des Hypothalamus.