A) femur
B) temporal bone
C) radius
D) sacral bone
E) tibia

A) Osteocytes $\rightarrow$ lacuna $\rightarrow$ blood vessels in central canals $\rightarrow$ diffusion through the canaliculi $\rightarrow$ blood vessels in periosteum & endosteum $\rightarrow$ general circulation
B) Osteocytes $\rightarrow$ lacuna $\rightarrow$ diffusion through the canaliculi $\rightarrow$ blood vessels in central canals $\rightarrow$ blood vessels in periosteum & endosteum $\rightarrow$ general circulation
C) Blood vessels in central canals $\rightarrow$ blood vessels in periosteum & endosteum $\rightarrow$ diffusion through the canaliculi $\rightarrow$ lucane $\rightarrow$ osteocyte
D) Blood vessels in periosteum & endosteum $\rightarrow$ blood vessels in central canals $\rightarrow$ diffusion through the canaliculi $\rightarrow$ lacuna $\rightarrow$ osteocyte
E) Blood vessels in periosteum $\rightarrow$ direct diffusion through the hard, ossified matrix $\rightarrow$ osteocyte

A) is essential for maintaining blood calcium levels
B) continues throughout the lifespan of the individual
C) is accomplished by the actions of the osteoclasts and osteoblasts
D) is controlled by the actions of Parathyroid Hormone, and Calcitonin.
E) All of these are true of bone remodeling.