Dictionary > Biological clock

Biological clock

Definition
noun, plural: biological clocks
Any of the various mechanisms that regulate biological rhythms
Supplement
A biological clock pertains to any of the various mechanisms that regulate biological rhythms such as sleep and wakefulness cycle, body temperature, patterns of hormone secretion, blood pressure, digestive secretions, alertness levels, reaction times, etc.1 Biological rhythms is the synchronized cyclic pattern demonstrated by an organism as its response to a particular stimulus. This biological clock seems to give the organism a sense of time as evidenced by a rhythmic pattern on its behavior. Biological clock that synchronizes with biological rhythm may be endogenous or exogenous. An endogenous type is one in which the internal biological clock is the one that controls it. An example of it is the body temperature cycle. An exogenous type is one that which involves an external cue (i.e. zeitgeber). An example is the sleep and wakefulness pattern. Other concepts related to biological clock are senescence, circadian clock, epigenetic clock, and molecular clock. Senescence is the ageing or the eventual deterioration of an organism through time. Biological clock may also pertain to female fertility wherein there is a gradual decrease of fertility from puberty to menopause. Circadian clock refers to the various mechanisms that result in a circadian rhythm.
Synonym(s):

  • body clock
  • internal clock

See also:

  • circadian clock
  • zeitgeber
  • Reference(s):

    1 Hedge, A. (2013). Biological Rhythms. Retrieved from ://ergo.human.cornell.edu/studentdownloads/dea3250pdfs/biorhythms.pdf


    You will also like...

    Principles of Hormonal Control Systems
    Principles of Hormonal Control Systems

    Hormones are essential in the regulation of the activity of the various biological systems of the human body. The ineffi..

    Human gastrointestinal tract
    Human Biology – Food and Digestion

    This tutorial recognizes the importance of food as a source of energy that will fuel many biological processes. A good d..

    Transpiration
    Water in Plants

    The movement of molecules (specifically, water and solutes) is vital to the understanding of plant processes. This tuto..

    green leaf - close up view
    Leaves

    Leaves are the major photosynthetic organ of a plant. Apart from that, they are also crucial to water movement. In this ..

    Golgi apparatus (3-D illustration)
    Role of Golgi Apparatus & Endoplasmic Reticulum in Protein Synthesis

    The endoplasmic reticulum and Golgi apparatus are the organelles involved in the translation step of protein synthesis a..

    Oligodendrocyte and Schwann cell
    The Central Nervous System

    Myelin sheath is essential for a faster conductivity of signals. Know more about this feature of some neurons in the Cen..