Dictionary > Kinesis

Kinesis

Definition
noun, plural: kineses
A behavioral response of a cell or an organism to a stimulus but not directionally oriented toward the source of stimulation
Supplement
Kinesis pertains to the movement of a cell or an organism in response to an external stimulus. It is different from taxis, which is also the movement of a cell or an organism in response to a stimulus but the direction of movement is affected by the stimulant. Kinesis is directionally not oriented, i.e. the movement can be in any direction or may be at random. Taxis is directionally oriented and the movement may be positive or negative. A positive movement is one in which the movement is towards the direction of the source of stimulation (attraction). A negative movement is when the cell or organism moves away from the direction of the source of stimulation (repulsion). Despite the difference between kinesis and taxis, both of them pertain to the movement in response to a stimulus. An example of kinesis is the movement of a cell or an organism as a result of its exposure to certain stimuli such as light, temperature, and chemical.
The two main types of kineses are orthokinesis and klinokinesis. Orthokinesis is a form of kinesis in which the speed of movement of the individual depends upon the intensity of the stimulus. An increase in the speed of movement is a positive orthokinesis whereas a decrease in the speed is referred to as negative orthokinesis. Klinokinesis is another form of kinesis wherein the frequency or rate of turning is proportional to the intensity of the stimulus.
Word origin: Ancient Greek ‎kínēsis (“motion, movement”)
Compare:

Related term(s):

  • chemokinesis
  • Synkinesis
  • Metakinesis
  • Stathmokinesis
  • Akinesis
  • Allokinesis
  • Lymphokinesis


    You will also like...

    Mātauranga Māori and Science Collaboration
    Mātauranga Māori and Science

    Mātauranga Māori is the living knowledge system of the indigenous people of New Zealand, including the relationships t..

    DNA molecule
    Genetic Control – On and Off Genes

    Genes are the blueprint of our bodies, a blueprint that creates a variety of proteins essential to any organism's surviv..

    Schematic diagram of DNA replication
    DNA Structure & DNA Replication

    DNA is a double helix structure comprised of nucleotides. A nucleotide, in turn, is made up of phosphate molecule, deoxy..

    Sigmund Freud and Carl Gustav Jung
    Sigmund Freud and Carl Gustav Jung

    In this tutorial, the works of Carl Gustav Jung and Sigmund Freud are described. Both of them actively pursued the way h..

    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..

    Chromosome Mutations
    Chromosome Mutations

    Mutations can also influence the phenotype of an organism. This tutorial looks at the effects of chromosomal mutations, ..