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chemotactic

chemotactic

1 8.7
Causing cells to move toward or away from a chemical
  • adjective
  • /ˌkiːmoʊˈtæktɪk/
  • Specialized
: quimiotáctico
  • In many organisms, chemotactic movement is crucial for locating food sources during foraging.
  • chemotactic response
  • chemotactic performance

Examples

  • The immune system uses chemotactic signals to guide white blood cells to sites of infection.

  • All configurations improved the chemotactic performance of E. coli, with an autoassociative filter being the best.

    Academic text (2012)
  • Physics is involved in almost every level of the chemotactic process.

    Academic text (2012)
  • Of course, those advantages would be limited if the chemotactic mechanisms employed by Dictyostelium were unique to that species.

    Academic text (2012)
  • Nanomotors can also compose a raft and transport the DNA message through a chemotactic process.

    Academic text (2011)
  • Microfluidic devices that precisely control the conditions experienced by cells have become an integral component of chemotactic experiments.

    Academic text (2012)
  • High concentrations of azithromycin are found within phagocytes and are transported via chemotactic mechanisms to the site of infection.

    Academic text (1995)
  • Sperm show a positive chemotactic response to the cellular contents that are discharged from the neck of a receptive archegonium, typically one per hermaphroditic gametophyte.

    Academic text (1998)
  • The stimulated macrophages secrete chemotactic factors such as lymphokines, which then attract T-helper (T4) lymphocytes.

    Academic text (2003)
  • Sperm cells exhibit a strong chemotactic response to certain chemicals released by the egg.

Surface Forms

chemotactic positive

Morphology

chemotactic = tactic (semi-transparent) = chemo + tactic + chemo

The combining form 'chemo-' is productive and the adjective is formed transparently from a recognizable base 'tactic', but the everyday meaning of 'tactic' (a plan) can mislead learners about the biological sense.

Etymology

Chemotactic comes from chemo- meaning 'chemical' and -tactic meaning 'directed movement'. So a chemotactic signal is like a tiny chemical scent that guides cells to move toward or away from a place.