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Taxis is an animal's directional movement activity in response to a stimulus Kinesis is an animal's non-directional movement activity in response to a stimulus; Trans-cultural diffusion, diffusion of cultural traits across geographical area; Turbulent diffusion, transport of mass, heat, or momentum within a turbulent fluid
Date/Time Thumbnail Dimensions User Comment; current: 21:17, 2 May 2008: 626 × 399 (158 KB): Bibi Saint-Pol {{Information |Description= {{en|Simple diffusion, the movement of particles from an area where their concentration is high to an area that has low concentration. one of the diferent ways in wich molecules move in cells.}} |Source=Own work.
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In physiology, a stimulus [1] is a change in a living thing's internal or external environment. This change can be detected by an organism or organ using sensitivity, and leads to a physiological reaction. [ 2 ]
Voltage gated sodium channels open in response to a stimulus and close again. This means the channel either is open or not, there is no part way open. Sometimes the channel closes but is able to be reopened right away, known as channel gating, or it can be closed without being able to be reopened right away, known as channel inactivation.
Kinesis, like a taxis or tropism, is a movement or activity of a cell or an organism in response to a stimulus (such as gas exposure, light intensity or ambient temperature). Unlike taxis, the response to the stimulus provided is non-directional.
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This means that the small, involuntary eye movements made when fixating on something fail to move the stimulus onto a new cell's receptive field, in effect giving unvarying stimulation. [2] Further experimentation this century by Hsieh and Tse showed that at least some portion of the perceptual fading occurred in the brain, not in the eyes. [3]