chemotaxis


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Related to chemotaxis: geotaxis, positive chemotaxis

chemotaxis

 [ke″mo-tak´sis]
list; movement (taxis) in response to the influence of chemical stimulation. adj., adj chemotac´tic.
leukocyte chemotaxis the response of leukocytes to products formed in immunologic reactions, wherein leukocytes are attracted to and accumulate at the site of the reaction; a part of the inflammatory response. See also inflammation.

che·mo·tax·is

, positive chemotaxisnegative chemotaxis (kē'mo-tak'sis),
1. Movement of cells or organisms in response to chemicals, whereby the cells are attracted (positive chemotaxis) or repelled (negative chemotaxis) by substances exhibiting chemical properties.
2. The migration of polymorphonuclear leukocytes and macrophages toward higher concentrations of certain fragments of complement.
[chemo- + G. taxis, orderly arrangement]

chemotaxis

(kē′mō-tăk′sĭs, kĕm′ō-)
n.
The characteristic movement or orientation of an organism or cell along a chemical concentration gradient either toward or away from the chemical stimulus.

che′mo·tac′tic (-tăk′tĭk) adj.
che′mo·tac′ti·cal·ly adv.

che·mo·tax·is

, positive chemotaxis , negative chemotaxis (kē'mō-tak'sis, pozi-tiv, negă-tiv)
Movement of cells or organisms in response to chemicals.
Synonym(s): chemotropism.

chemotaxis

The movement of a cell or other living organism in a particular direction as a result of attraction by an increasing concentration of a chemical substance. Cells of the immune system find their prey by this means.

chemotaxis

the orientation of a motile cell or an organism in relation to the presence of a particular chemical, the response to a chemorepellent being negative (moving away) and to a chemoattractant being positive (moving towards). For example, the movement of a wasp towards an attractive odour such as beer would be positive chemotaxis. Cells are able to detect changes in the concentration of the chemical and alter their mobility accordingly For example, bacteria will change their pattern of swimming and tumbling.

che·mo·tax·is

, positive chemotaxis , negative chemotaxis (kē'mō-tak'sis, pozi-tiv, negă-tiv)
Movement of cells in response to chemicals, whereby the cells are attracted or repelled by substances exhibiting chemical properties.
References in periodicals archive ?
Chemotaxis of Arbacia punctulata spermatozoa to resact.
Overview of mathematical approaches used to model bacterial chemotaxis ii: bacterial populations.
The chemotaxis operator and reproduction operator of the BFA are based on the fitness value of individual bacteria for the evolution of the evaluation criteria.
Toll-like receptor 9 activation in neutrophils impairs chemotaxis and reduces sepsis outcome.
In QBFO, a multiqubit is used to represent a bacterium, and quantum rotation gate is used to mimic chemotaxis. A multiqubit system (for example n-qubit system) has available 2n mutually orthogonal quantum states, so the quantum bacterium with multiqubit has the advantage that it can represent a linear superposition of states (binary solutions) in search space probabilistically.
Apart from regulating monocyte adhesion and migration into the arterial wall, MCP-1 regulates chemotaxis and promotes proliferation of smooth muscle cells.
The activity in which the bacteria gather in the nutrient-rich areas due to their inherent tendency is called "chemotaxis".
In the current study, How blebs and pseudopods cooperate during chemotaxis, they demonstrate that cell shape influences how these motors interact.
Chemotaxis assays demonstrated that EMPB acted an MSC chemoattractant and that the main chemotactic activity of EMPB may be due to the effects of cinnamtannin B-l.
Chemotaxis is the influence of chemical substances in the environment on the movement of mobile species.
This receptor is involved in the chemotaxis of leucocytes to inflammation sites [10] and plays important role in the recruitment of macrophages, T cells, and monocytes in inflammation [11].