Ming posed the following question: “If the epiphyseal growth plates are growing so fast, why do they stay thin? Growing things are supposed to get larger or thicker, but these plates remain the same thickness.” How would you answer her?

A pair of siblings watched as their mother flatten one of two equal-sized balls of clay into a flat plate. The mother gave the ball to Pete and the plate to Paula. Pete cried and complained that Paula had more clay to play with because Paula's plate was larger than his ball. Paula soothed him saying that they both had the same amount of clay to play with, despite the differences in the shape of the clay. When her mother asked Paula how she knew that the ball and the plate had the same amount of clay, she pointed out that the plate could once again be rolled up into a ball, like Pete’s. What would explain the differences in their responses?

What would happen if calcium could not get out of the cytoplasm but there was abundant ATP?

1. You wish to use the polymer ultra-high-molecular- weight polyethylene (UHMWPE) as a scaffold to make a new tendon. a) You wish to modify the surface to help tenocytes and tenoblasts (cells that usually reside in the tendon) attach to the material. How can you do this?