THE NOISE PROBLEM IN CHEMOTAXIS

THE NOISE PROBLEM IN CHEMOTAXIS

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Part of #THE NOISE PROBLEM IN CHEMOTAXIS# :

Publishing year : 2003

Conference : 11th Iranian Conference on Medical Engineering

Number of pages : 4

Abstract: The chemotactic capability of some cells is infinitely useful for their survival. This capability is based on the mechanisms that detect the concentration difference across the cell diameter. This signal (concentration gradient) decreases with the distance from the source. On the other hand, there is a noise caused by thermal motions of molecules infecting this signal. There is a distance from the source, beyond which the signal is less than noise, and the cells there could not make a definite decision about source direction. Probable mechanisms for reducing noise and extending this distance threshold have been discussed in this article. It has also been argued that if the diffusion coefficient would be a function of concentration, it could cause different ways of the Signal-to-Noise Ratio dependence on distance and imply an interesting cell chemotactic behavior
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