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In normal adult bones,


A) there is no turnover of minerals.
B) a portion of the protein and mineral content is replaced each year.
C) osteoblast activity exceeds osteoclast activity,once bone has been formed.
D) osteoclasts continue to be active long after osteoblast activity ceases.
E) exercise will have no effect on bone remodeling.

F) B) and C)
G) B) and D)

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The following are important steps in the process of endochondral ossification. 1.Enlarged chondrocytes die. 2) Osteoblasts replace calcified cartilage with spongy bone. 3) Chondrocytes enlarge and the surrounding matrix begins to calcify. 4) Blood vessels invade the perichondrium. 5) Perichondrial cells become osteoblasts and produce a thin shell of bone. The correct order for these events is


A) 3,1,5,4,2
B) 1,3,5,4,2
C) 1,5,3,4,2
D) 2,3,1,5,4
E) 3,1,4,5,2

F) A) and E)
G) B) and E)

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How is vitamin D (vitamin Dā‚ƒ) 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 so calcium is available for ossification and remodeling.
E) Vitamin D replaces calcium in the skeleton.

F) A) and E)
G) A) and D)

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Osteoclast-activating factor does all of the following,except that it


A) is released in large amounts early in life.
B) increases the number of osteoclasts.
C) increases the activity of osteoclasts.
D) produces a severe osteoporosis.
E) is released by some cancer tumors.

F) B) and C)
G) B) and E)

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The condition known as osteopenia


A) affects mostly women.
B) causes a gradual reduction in bone mass.
C) is caused by too much vitamin D in the diet.
D) is rarely seen as people age.
E) only affects the femur.

F) B) and E)
G) A) and E)

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________ cells are located in the inner cellular layer of the periosteum.


A) Osteocyte
B) Osteoclast
C) Osteoid
D) Osteoprogenitor
E) Chondroblast

F) B) and E)
G) A) and D)

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The space occupied by an osteocyte is called a


A) Volkmann's canal.
B) lacuna.
C) trabecula.
D) Haversian canal.
E) Venetian canal.

F) D) and E)
G) All of the above

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________ fibers are stronger than steel when stretched.(Note: Be sure to capitalize the first letter of your answer).

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The ongoing process of tearing down and rebuilding bone matrix is called ________ .

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Bones that develop within tendons are called ________ bones.


A) irregular
B) sesamoid
C) sutural
D) Wormian
E) tendon

F) A) and B)
G) A) and D)

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A child with rickets often has


A) oversized facial bones.
B) long fingers.
C) frequent bruises.
D) bowed legs.
E) inadequate muscle development.

F) B) and D)
G) A) and B)

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What is the difference between ossification and calcification.?

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Ossification means specificall...

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The organic component of the matrix in developing or repairing bone is called ________.

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Which of the following is a characteristic of bone?


A) The bone matrix is very dense and contains deposits of calcium salts.
B) The matrix of the bone contains osteoclasts.
C) Narrow channels pass through the matrix to allow for muscle attachment.
D) The matrix of bone is mostly collagen with very little calcium.
E) For strength,compact bone is organized into a meshwork of matrix called trabeculae.

F) All of the above
G) C) and D)

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Cells that free calcium from bone to maintain blood calcium levels are called ________.

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If osteoclasts are more active than osteoblasts,bones will become


A) denser.
B) thicker.
C) osteopenic.
D) stronger.
E) calcified.

F) A) and B)
G) A) and E)

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   Figure 6-1 Bone Tissue Use Figure 6-1 to answer the following questions: -The structure labeled  3  is the result of which process? A) bone cells adding matrix between existing osteons B) surface growth of bone C) remodeling of compact bone D) remodeling of spongy bone E) osteoporosis Figure 6-1 Bone Tissue Use Figure 6-1 to answer the following questions: -The structure labeled "3" is the result of which process?


A) bone cells adding matrix between existing osteons
B) surface growth of bone
C) remodeling of compact bone
D) remodeling of spongy bone
E) osteoporosis

F) C) and D)
G) D) and E)

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   Figure 6-2 Endochondral Ossification Use Figure 6-2 to answer the following question(s) : -What process is shown at #6? A) primary ossification B) secondary ossification C) length growth D) width growth E) fracture repair Figure 6-2 Endochondral Ossification Use Figure 6-2 to answer the following question(s) : -What process is shown at #6?


A) primary ossification
B) secondary ossification
C) length growth
D) width growth
E) fracture repair

F) B) and D)
G) C) and D)

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Bone growth in length occurs by mitosis of


A) concentric lamellae.
B) cartilage cells in the epiphyseal side of the metaphysis.
C) growth of trabeculae.
D) osteoblasts in the endosteum.
E) cartilage cells in the diaphyseal side of the metaphysis.

F) None of the above
G) C) and D)

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A(n)________ fracture shatters the bone.

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