Not really, these are cells that produces lytic enzymes
(osteoclast to be exact) to eat up the bone, not hormonal...
certainly not, but the hormone stimulates these cells and keep them
in action...
Osteoblast is a progenitor cell which means it can differentiate
into either an osteocyte or another bone cells that I've forgotten.
Osteoclast is not deduced from here as it is a white blood cell, a
macrophage... 
