Fibroblasts organize the collagen of the extracellular matri

Fibroblasts organize the collagen of the extracellular matrix by:

a. cutting and rejoining the fibrils

b. crawling along existing fibrils and adjusting the packing of collagen molecules within them

c. twisting fibrils together to make ropelike fibers

d. pulling the collagen into sheets or cables after it has been secreted (NOTE: I have already tried this answer and it was counted wrong.)

e. controlling the local Ca2+ concentration so as to regulate collagen assembly

Solution

Fibroblasts organize the collagen of the extracellular matrix by controlling the local Ca2+ concentration so as to regulate collagen assembly.