The medullary cavity is lined by the that separates it from the cortex.

PathologicA break in a bone that is already weakened by some other disease is called a (n)

greenstick
open
closed
pathologic
displacehematoma formation--soft callus formation--hard callus formation-- bone remodelingWhich of the following is the correct sequence of events in the healing of a bone fracture

Bone remodeling--soft callus formation--hard callus formation--hematoma formation
Bone remodeling--hard callus formation--soft callus formation--hematoma formation
Hematoma formation--soft callus formation--hard callus formation-- bone remodeling
Hematoma formation--hard callus formation--soft callus formation--bone remodeling
Soft callus formation--hard callus formation--hematoma formation--bone remodelingsoft callus; hard callusPatches of fibrocartilage formed in the healing of a fracture are called , where as the bony collar formed around the fracture is called

fracture hematoma; granilation tissue
granulation tissue; soft callus
fracture hematoma; hard callus
granulation tissue; hard callus
soft callus; hard callusosteoporosisThe most common bone disease is

osteomyelitis
osteoporosis
osteosarcoma
osteomalacia
ricketsmuscle spasmsHypocalcemia can cause

emotional disturbances
depression of the nervous system
muscle weakness
sluggish reflexes
muscle spasmsabnormal calcification of a tissusArteriosclerosis is one example of ectopic ossification, which means

the solubility product has been reached
artery mineralization by osteoblasts
abnormal calcification of a tissue
accumulation of collagenous fibers in blood vessels
ossification of an entire blood vesselan elevated level of osteoblast activityIf a thyroid tumor secreted an excessive amount of calcitonin, we would expect 

an elevated level of osteoclast activity
an elevated level of osteoblast activity
a reduced rate of endochondral ossification
increasingly brittle bonesthe healing of a fractureA soft callus forms during

endochondral ossification
intramembranous ossification
bone growth at the metaphysis
the remodeling of bone
the healing of a fracture