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Chemotaxis

Chemotaxis

a response of motile cells or organisms in which the direction of movement is affected by the gradient of a diffusible substance. Differs from chemokinesis in that the gradient alters probability of motion in one direction only, rather than rate or frequency of random motion.

chemotaxis is a kind of taxis, in which bodily cells, bacteria, and other single-cell or multicellular organisms direct their movements according to certain chemicals in their environment. This is important for bacteria to find food (for example, glucose) by swimming towards the highest concentration of food molecules, or to flee from poisons (for example, phenol). In multicellular organisms, chemotaxis is critical to development as well as normal function. In addition, it has been recognized that mechanisms that allow chemotaxis in animals can be subverted during cancer metastasis.


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eosinophil chemotactic factor help

... but then I found autocrine, so now I'm unsure.) 4. Name of receptor (enzyme?) 5. Cellular functions associated with signal (stimulates chemotaxis of eosinophils?) 6. Gene function it controls (responsible for accumulation of eosinophils at sites of inflammation?) I also have to find ...

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by relamberth
Tue Dec 01, 2009 11:23 pm
 
Forum: Cell Biology
Topic: eosinophil chemotactic factor help
Replies: 2
Views: 1730

How do Cells "think"...

There's a recent systems bio paper on chemotaxis http://www.pnas.org/content/97/9/4649.full basically an error signal is produced by the sensors that is integrated by a controller and outputted to the actuator (flagella motor). The network has ...

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by mith
Wed Nov 25, 2009 7:47 pm
 
Forum: Cell Biology
Topic: How do Cells "think"...
Replies: 7
Views: 6937

Re: How do Cells "think"...

... changes to an input before delivering the output." I am reading a lot of information about "receptors" (inputs) and about "chemotaxis" (outputs) but not a lot about what happens in between. I do see a lot of research results of the "in between" part immediately ...

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by lenfromkits
Mon Nov 23, 2009 6:11 am
 
Forum: Cell Biology
Topic: How do Cells "think"...
Replies: 7
Views: 6937

How do Cells "think"...

... What is a nervous system composed of? Cells. Thus we "think" with our cells (albeit a composite of many different types of cells). Chemotaxis is one way, but it all has to do with biochemicals and their reactions. Interaction with the environment is usually by cell signaling (ligands ...

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by kolean
Mon Nov 23, 2009 3:12 am
 
Forum: Cell Biology
Topic: How do Cells "think"...
Replies: 7
Views: 6937

How do Cells "think"...

Chemotaxis could be involved, and does not involve thinking, just a positive feedback within a chemical gradient.

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by canalon
Mon Nov 23, 2009 2:22 am
 
Forum: Cell Biology
Topic: How do Cells "think"...
Replies: 7
Views: 6937
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