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Quantitation of changes in cell shape using computerized image analysis demonstrated that PDGF doubled the total projected area of lamellipodia formed by each cell within 5 min of addition and increased it by almost 10-fold at 30 min (Fig. 3 â A).o determine relative changes in lamellipodia length in different regions of the cell, corners were defined as parts of the square perimeter within 6 Î¼m from the intersection of the two sides; sides were defined as the 18 Î¼m interval between these corner regions.
At left you see a close up of the myoneme in action. This was taken with phase contrast. Above, you can see the cilia in a circular pattern around the tip as well as the band shaped nucleus (shape of a C) inside the protist. The Vorticella is a protist (protozoan) and belongs to the Phyllum Ciliophora.It is a very interesting, stalked ciliate with an inverted bell shape. The stalk contains a contractile fibril called a myoneme.When stimulated, it shortens, causing the stalk to coil like a spring.t left you see a close up of the myoneme in action. This was taken with phase contrast. Above, you can see the cilia in a circular pattern around the tip as well as the band shaped nucleus (shape of a C) inside the protist. The Vorticella is a protist (protozoan) and belongs to the Phyllum Ciliophora.