Chemokinesis

Chemokinesis

Motile response of unicellular prokaryotic or eukaryotic organisms to chemicals that cause the cell to make some kind of change in their migratory/swimming behaviour. Changes involve an increase or decrease of speed, alterations of amplitude or frequency of motile character, or direction of migration. However, in contrast to chemotaxis, chemokinesis has a random, non-vectorial moiety, in general.[1] [2]
Due to the random character, techniques dedicated to evaluate chemokinesis are partly different from methods used in chemotaxis research. One of the most valuable ways to measure chemokinesis is computer assisted (see e.g. Image J) checker-board analysis which provides data about migration of identical cells, while in Protozoa (e.g. Tetrahymena) techniques based on measurement of opalescence were also developed.[3]


Chemokinesis

References

  1. ^ Becker EL (1977). "Stimulated neutrophil locomotion: chemokinesis and chemotaxis.". Arch Pathol Lab Med. 101 (10): 509–13. PMID 199132. 
  2. ^ Wilkinson PC. (1990). "How do leucocytes perceive chemical gradients?". FEMS Microbiol Immunol. 2(5-6) (5–6): 303–11.. doi:10.1111/j.1574-6968.1990.tb03533.x. 
  3. ^ Leick V, Hellung-Larsen P. (1992). "Chemosensory behaviour of Tetrahymena". Bioessays 14 (1): 61–6. doi:10.1002/bies.950140113. PMID 1546982. 

External links


Wikimedia Foundation. 2010.

Игры ⚽ Нужна курсовая?

Look at other dictionaries:

  • chemokinesis — n. [Gr. chemeia, pert. chemistry; kinesis, movement] Increased movement of an organism due to the presence of a chemical substance; chemokinetic adj …   Dictionary of invertebrate zoology

  • chemokinesis — A response by a motile cell to a soluble chemical that involves an increase or decrease in speed (positive or negative orthokinesis) or of frequency of movement, or a change in the frequency or magnitude of turning behaviour (klinokinesis) …   Dictionary of molecular biology

  • chemokinesis — chemokinetic /kee moh ki net ik, kuy , kem oh /, adj. /kee moh ki nee sis, kuy , kem oh /, n. increased activity of an organism due to a chemical substance. [1895 1900; CHEMO + KINESIS] * * * …   Universalium

  • chemokinesis — noun The motile response of an organism to chemical compounds, especially at a cellular level …   Wiktionary

  • Chemokinesis — The response of a cell to a chemical that causes the cell to make some kind of change in its movement by speeding it up, slowing it down or changing its direction. The molecules that achieve these results are called chemokines. * * * Stimulation… …   Medical dictionary

  • chemokinesis — n. increased activity of an organism under the influence of a chemical substance …   English contemporary dictionary

  • chemokinesis — chemo·kinesis …   English syllables

  • chemokinesis — /kimoʊkəˈnisəs/ (say keemohkuh neesuhs) noun a change in the movement of free moving cells in the body, when stimulated by a chemical agent. {chemo + kinesis} –chemokinetic /kimoʊkəˈnɛtɪk/ (say keemohkuh netik), adjective …  

  • chemokinesis —   n. increase in activity caused chemically.    ♦ chemolysis, n. decomposition chemically caused.    ♦ chemonuclear, adj. pertaining to or arising from both a chemical and a nuclear reaction.    ♦ chemoprophylaxis, n. prevention by means of a… …   Dictionary of difficult words

  • chemokinesis — …   Useful english dictionary

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”