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anatomy answer key

anatomy answer key - 1 Which of following is a function of...

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1) Which of following is a function of the skeletal system? E) all of the above 2) Which of the following bones is classiFed as "irregular" in shape? A) vertebra 3) The carpal bones are examples of ________ bones. D) short 4) A rib is an example of a ________ bone. B) flat 5) The region of a long bone between the end and the shaft is known as the ________. E) metaphysic 6) Which of the following labels best matchesosteocyte? D) mature bone cell 7) Cells that secrete the organic components of the bone matrix are called E) osteoblasts. 8) ________ are squamous cells that develop into osteoblasts. E) Osteoprogenitor cells 9) Through the action of osteoclasts, B) bony matrix is dissolved. 10) Which of the following chemicals is not present in bone? D) chondroitin sulfate. 11) The narrow passageways that contain cytoplasmic extensions of osteocytes are called A) canaliculi. 12) The central canal of an osteon contains C) blood vessels. 13) The interconnecting tiny arches of bone tissue found in spongy bone are called C) trabeculae. 14) The type of bone that is adapted to withstand stresses that arrive from many directions is ________ bone. C) trabecular 15) The medullary cavity of bones contains E) marrow. 16) The shaft of a long bone is called the A) diaphysis. 17) The lining of the medullary cavity is called the C) endosteum.
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18) What structure allows a bone to grow in length? C) epiphyseal plate 19) The following are major steps in the process of intramembranous ossiFcation. 1. Clusters of osteoblasts form osteoid that becomes mineralized. 2. Osteoblasts differentiate within mesenchymal connective tissue. 3. Spicules of bone radiate out from the ossiFcation centers. 4. Mesenchymal cells aggregate. A) 4, 2, 1, 3. 20) Which of the following is formed by intramembranous ossiFcation? A) roof of the skull D) clavicle 21) Endochondral ossiFcation begins with the formation of a(n) A) cartilage model. 22) The following are important steps in the process of endochondral ossiFcation. 1. Enlarged chondrocytes die. 2. Osteoblasts replace calciFed 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 C) 3, 1, 5, 4, 2. 23) Secondary ossiFcation centers occur D) in the epiphyses. 24) When production of sex hormones increases at puberty, epiphyseal plates B) become narrower. 25) The most abundant mineral in the human body is C) calcium. 26) Elevated levels of calcium ion in the blood stimulate the secretion of the hormone D) calcitonin. 27) Osteoclast-activating factor does all of the following, except that it C) is released in large amounts early in life. 28) The hormone calcitonin functions to
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