(answer with a paragraph or a few sentences for each)
1. The structure of cartilage (in general), how types ofcartilage differ from one another, and the importance of theperichondrium associated with cartilage
2. The activity of osteoblasts, balancing osteoclast activitywith osteoblast activity, and ways through which various signalmolecules control osteoclast activity
3. Comparison of cartilage and bone (particularly a long bone)with respect to the blood supply that supports cells of thetissue
