What kind of tissue is the forerunner of long bones in the embryo?
A) elastic connective tissue
B) dense fibrous connective tissue
C) fibrocartilage
D) hyaline cartilage
E) loose fibrous connective tissue
D
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How is vitamin D (vitamin D3 ) related to calcium homeostasis in bone?
A) Vitamin D provides a framework for calcium in the matrix. B) Vitamin D is regulated by osteoclast activity. C) Vitamin D is produced by osteoblasts during endochondral ossification. D) Vitamin D is involved in calcium absorption by the digestive tract. E) Vitamin D replaces calcium in the skeleton.
Which is an accurate description of appositional bone growth?
A. Osteoblasts build bone at the circumferential lamellae while osteoclasts widen the medullary cavity. B. Osteoclasts build bone at the concentric lamellae while osteoblasts build bone at the interstitial lamellae. C. Osteoblasts build bone at the concentric lamellae while osteoclasts build bone at the epiphyses. D. Osteocytes build bone at the interstitial lamellae while osteoclasts expand the length of the medullary cavity. E. Osteocytes and osteoclasts expand the bone at its epiphyses, chondrocytes construct cartilage.
What is the term used to describe the length of time it takes for one half of a substance to be eliminated from the circulatory system?
A. Conjugation B. Half-life C. Metabolism D. Excretion
Osteoclasts are bone-resorbing cells, whereas osteoblasts are bone-forming cells.
Answer the following statement true (T) or false (F)