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amoeboid movement
amoeboid movement The mechanism of movement demonstrated by Amoeba and other cells that are capable of changing their shape (e.g. phagocytes). The cytoplasm of Amoeba consists of a central fluid plasmasol surrounded by a more viscous plasmagel. The plasmagel is converted to plasmasol, which slides towards the front of the cell, forming a pseudopodium and propelling the cell forward. On reaching the tip of the pseudopodium, this plasmasol is reconverted into plasmagel; at the same time the plasmagel at the rear of the cell is converted into plasmasol and streams forward, thus maintaining continuous movement.
Amoeboid movement is brought about by reversible changes in the actin filaments of the cell's cytoskeleton. Cross-linking of these filaments by other proteins creates a three-dimensional network with gel-like properties in the plasmagel region. Disassembly of this network causes reversion to the sol state of plasmasol. |
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"amoeboid movement." A Dictionary of Biology. 2004. Encyclopedia.com. 30 May. 2012 <http://www.encyclopedia.com>. "amoeboid movement." A Dictionary of Biology. 2004. Encyclopedia.com. (May 30, 2012). http://www.encyclopedia.com/doc/1O6-amoeboidmovement.html "amoeboid movement." A Dictionary of Biology. 2004. Retrieved May 30, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O6-amoeboidmovement.html |
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amoeboid movement
amoeboid movement (ameboid movement) Movement in the fashion of an amoeba, i.e. by pseudopodia (see PSEUDOPODIUM).
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Cite this article
MICHAEL ALLABY. "amoeboid movement." A Dictionary of Zoology. 1999. Encyclopedia.com. 30 May. 2012 <http://www.encyclopedia.com>. MICHAEL ALLABY. "amoeboid movement." A Dictionary of Zoology. 1999. Encyclopedia.com. (May 30, 2012). http://www.encyclopedia.com/doc/1O8-amoeboidmovement.html MICHAEL ALLABY. "amoeboid movement." A Dictionary of Zoology. 1999. Retrieved May 30, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O8-amoeboidmovement.html |
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