Movement by a cell or organism in reaction to a chemical stimulus.
Chemotaxis, movement toward or away from chemicals, is a universal attribute of motile cells and organisms. E. coli cells swim toward amino acids (serine and aspartic acid), sugars (maltose, ribose, galactose, glucose), dipeptides, pyrimidines and electron acceptors (oxygen, nitrate, fumarate).  chemotaxis. Chemotaxis is a signal transduction system that confers to the ability of cells to respond to spatial and temporal chemical gradients. In prokaryotes and unicellular eukaryotes, chemotaxis controls motile behavior Chemotaxis (from chemo- + taxis) is the movement of an organism in response to a chemical stimulus. Somatic cells, bacteria, and other single-cell or multicellular organisms direct their movements according to certain chemicals in their environment. Although chemotaxis is the most frequently studied form of migration there are several other forms of locomotion in the cellular level. 1  Chemokinesis is also induced by molecules of the liquid phase of the surrounding environment; however, the response elicited is a not vectorial, random taxis. chemotaxis-movement by a cell or organism in reaction to a chemical stimulus. taxis-a locomotor response toward or away from an external stimulus by a motile (and usually simple) organism. 1. chemotaxis-movement by a cell or organism in reaction to a chemical stimulus. taxis-a locomotor response toward or away from an external stimulus by a motile (and usually simple) organism. negative chemotaxis-movement away from chemotaxis (kē´mōtak´sis) , n a response involving movement that is positive (toward) or negative (away from) to a chemical stimulus. chemotaxis, leukocyte, n the phagocytic activity of neutrophils and monocytes in response to chemical factors released by invading microorganisms. 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. In multicellular organisms, chemotaxis is critical to early development (e.g., movement of sperm towards the egg during fertilization) and subsequent phases of development (e.g., migration of neurons or lymphocytes) as well as in normal function. Although chemotaxis is the most frequently studied form of migration there are several other forms of locomotion in the cellular level. 1  Chemokinesis is also induced by molecules of the liquid phase of the surrounding environment; however, the response elicited is a not vectorial, random taxis. Noun. 1. chemotaxis-movement by a cell or organism in reaction to a chemical stimulus. taxis-a locomotor response toward or away from an external stimulus by a motile (and usually simple) organism. negative chemotaxis-movement away from a chemical stimulus. positive chemotaxis-movement toward a chemical stimulus. chemotaxis. n. 1. (Microbiology) the movement of a microorganism or cell in response to a chemical stimulus. (ˌki moʊˈtaek moʊˈtæk, sɪs ˌkɛm-). oʊ. n Positive chemotaxis occurs if the movement is toward a higher concentration of the chemical in question; negative chemotaxis if the movement is in the opposite direction. Chemically prompted kinesis (randomly directed or nondirectional) can be called chemokinesis. Although chemotaxis is the most frequently studied form of migration there are several other forms of locomotion in the cellular level. 1  Chemokinesis is also induced by molecules of the liquid phase of the surrounding environment; however, the response elicited is a not vectorial, random taxis. You won't believe these 10 facts about people. Chemotaxis is movement of small organisms and single cells in response to chemical signals in the surrounding environment. During fetal development, chemotaxis also plays a role in the movement of cells as the organism develops; budding nerve cells, for example, start to distribute themselves to map out the nervous system. Etymology: Gk, chemeia + taxis, arrangement. movement toward or away from a chemical stimulus. Chemotaxis is a cellular function, particularly of neutrophils and monocytes, whose phagocytic activity is influenced by chemical factors released by invading microorganisms. 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.
http://chemotaxis.biology.utah.edu/Parkinson_Lab/projects/ecolichemotaxis/ecolichemotaxis.html http://biologyofcells.blogspot.com/2007/12/chemotaxis.html https://en.wikipedia.org/wiki/Chemotaxis http://www.thefreedictionary.com/chemotactic http://medical-dictionary.thefreedictionary.com/chemotaxis https://en.wikipedia.org/wiki/Chemotaxis http://www.thefreedictionary.com/chemotaxis https://en.wikipedia.org/wiki/Chemotaxis http://www.wisegeek.com/what-is-chemotaxis.htm http://medical-dictionary.thefreedictionary.com/chemotaxis
what is chemotaxis