What is the major function of each of these systems?

Explain why some cells in a females body respond to reproductive hormones while other cells do not.

When a person undergoes root canal treatment or another endodontic treatment: [select all that apply] a.) the inside of the tooth is carefully cleaned and disinfected. b.) air is forced into the canal to stop bleeding. c.) the inflamed/infected pulp is removed. d.) the inside of the tooth is filled and sealed with a rubber-like material called gutta-percha

So i have a lot of answers answered but it says i still need to answer more questions. why is it doing that? how many questions need to be answered?