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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.
Lesson Summary. Trabeculae are thin columns and plates of bone that create a spongy structure in cancellous bone, which is located at the ends of long bones, and in the pelvis, ribs, skull, and vertebrae.one tissue is formed by cells called osteoblasts and is secreted in rings called lamellae that expand outward as the trabeculae get larger. As new tissue grows around the osteoblast, a hard ceramic material called calcium phosphate begins to surround the cell.