题目内容

_____ refers to the replacement of old bone tissue by new bone tissue.

A. reconstruction
B. remodeling
C. resuppying
D. resorption

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The distal portion of the _____ is replaced about every 4 months.

A. femur
B. tibia
C. fibula
D. humerus

Remodeling can allow bone to serve the body's storage area for _____.

A. phosphorus
B. calcium
C. vitamins
D. iron

_____ are cells that are believed to be responsible for resorption of bone tissue.

A. osteoblasts
B. osteoclasts
C. lymphoblasts
D. chondroclasts

______, which is released from lysosomes, is belived to digesting collagen and other organic substance.

A. protein-digesting enzymes
B. lactic acid
C. citric acid
D. calcitonin

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