what is uriod for 1marck
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the course of these rhythmically repeated transformations of the uroid, pinocytotic processes can be demonstrated, which are bound to the normal locomotion of the cells.
Some amoebozoans have a posterior bulb called a uroid, which may serve to accumulate waste, periodically detaching from the rest of the cell.
In agreement with the localisation of permanent pinocytosis in the uroid region, a transport of particles (adhering to the mucous layer of the cell membrane) to the uroid could be demonstrated. Tracer particles, transported in this way to the uroid, accumulate at the caudal pole of the cell.
Chaos and its close relative, Amoeba, are now placed in the latter, within the order Tubulinida: naked amoebas (lacking a test, or shell), either monopodial or possessing somewhat cylindrical pseudopods, with non-adhesive uroid (a region at the posterior of the cell which has a crumpled appearance).
During locomotion Hyalodiscus simplex is active in permanent endocytosis at the uroid region. Thereby plasma membrane and extracellular medium are translocated into the cell interior.
They are 9–14 nm in diameter and are therefore considered to be myosin-like filaments, that are spread mainly in the tail or the uroid of the moving ameba.
A moving cell is cylindrical in shape, with a single hemispherical pseudopod at the front and a semipermanent projection called a uroid at the back, which is covered in tiny non-motile flagella.
During active locomotion of Amoeba proteus, the uroid shows characteristic changes in shape and behaviour consisting of four different stages.
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