Dictionary > Chemokinesis

Chemokinesis

Definition
noun
A behavioral response of a cell or an organism to a soluble chemical that leads to random or directionally non-oriented movement
Supplement
Chemokinesis is the non-oriented or random movement of a motile cell to a soluble chemical. It should not be confused with the other term, chemotaxis. 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). It is a response of motile cells or organisms in which the direction of movement is affected by the gradient of a diffusible substance. It differs from chemokinesis in that the gradient alters probability ofmotion in one direction only, rather than rate or frequency of random motion. Similarly though, both chemotaxis and chemokinesis is chemically prompted movement of a cell.
Chemokinesis involves orthokinesis and klinokinesis. Orthokinesis is a form of kinesis in which the speed of movement of the individual depends upon the intensity of the stimulus. An increase in the speed of movement is a positive orthokinesis whereas a decrease in the speed is referred to as negative orthokinesis. Klinokinesis is another form of kinesis wherein the frequency or rate of turning is proportional to the intensity of the stimulus.
Word origin: chemo– (of chemicals) + kinesis
Compare:


You will also like...

Adaptive Radiation
Adaptive Radiation

The diversification of several new species from a recent ancestral source, each adapted to utilize or occupy a vacant ad..

Digestion and Absorption of Food
Digestion and Absorption of Food

The gastrointestinal system breaks down particles of ingested food into molecular forms by enzymes through digestion and..

Bryophytes
Bryophytes

Bryophytes (nonvascular plants) are a plant group characterized by lacking vascular tissues. They include the mosses, th..

The process of photosynthesis
Photosynthesis – Photolysis and Carbon Fixation

Photosynthesis is the process that plants undertake to create organic materials from carbon dioxide and water, with the ..

Pikas are an indicator species for climate change
Indicator Species and Endangered Species

Certain species are capable of expressing characteristics indicative of the state of the ecosystem they occupy. They are..

Structural depiction of catalase, an enzyme
Protein Activity and Cellular Metabolism

Proteins have a crucial role in various biological activities. Get to know how proteins are able to perform as enzymes, ..