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Motility is a biological term which refers to the ability to move spontaneously and actively, consuming energy in the process. It can apply to either single-celled or multicellular organisms. Examples of motility include:
- Sperm cells, propelled by the regular beat of their flagellum
- The bacterium E. coli, which swims by roting a helical prokaryotic flagellum
In cellular biology or biomedical engineering, motility often refers to directed cell movement down gradients established in biopolymers. Examples include:
- movement along a chemical gradient (see chemotaxis)
- movement along a temperature gradient (see thermotaxis)
- movement along a magnetic field line (see magnetotaxis)
- movement along the direction of the gravitational force (see gravitaxis)
- movement along a rigidity gradient (see durotaxis)
- movement along a gradient of cell adhesion sites (see haptotaxis)
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- This page was last modified on 12 August 2008, at 17:08.
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