The decline in bone breakdown and increased mineralization causes blood calcium to back to normal levels.

The decline in bone breakdown and increased mineralization causes blood calcium to decrease back to normal levels. This happens when there is secretion of calcitonin. This circulation calcitonin is inhibiting osteoclasts and it will stimulate osteoblasts within minutes. The effect of this on osteoclast will cause a decrease in reabsorption and a concurrent increase in deposition because of the osteoblasts activity.

I think it’s lines c and d are parallel because

12(10)-5=

120-5=115

10(10)+15

100+15=115

Step-by-step explanation: