Chapter 6 - Chapter 6 Bones and Skeletal Tissues 1...

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Chapter 6: Bones and Skeletal Tissues 1) Hematopoiesis refers to the formation of blood cells within the red marrow cavities of certain bones. True 2) Compact bone is replaced more often than spongy bone. False 3) Bones are classified by whether they are weight-bearing or protective in function. False 4) The periosteum is a tissue that serves only to protect the bone because it is not supplied with nerves or blood vessels. False 5) Short, irregular, and flat bones have large marrow cavities in order to keep the weight of the bones light. False 6) In newborn infants, the medullary cavity and all areas of spongy bone contain yellow bone marrow. False 7) The structural unit of compact bone (osteon) resembles the growth rings of a tree trunk. True 8) The term osteoid refers to the organic part of the matrix of compact bones. True 9) Sixty-five percent of the mass of bone is a compound called hydroxyapatite. True 10) All bones formed by intramembranous ossification are irregular bones. False 11) An osteon contains osteocytes, lamellae, and a central canal, and is found in compact bone only. True 12) The trabeculae of spongy bone are oriented toward lines of stress. True 13) Bone tissue in the skeleton of a human fetus is completely formed at six months' gestation. False 14) Each consecutive bone lamella has collagen fibers that wrap in alternating directions. True 15) Cartilage has a flexible matrix which can accomodate mitosis of chrondrocytes. True 1) The structure of bone tissue suits the function. Which of the following bone tissues is adapted to support weight and withstand tension stress? A) spongy bone B) irregular bone C) compact bone D) trabecular bone 2) Yellow bone marrow contains a large percentage of ________. 3) The cell responsible for secreting the matrix of bone is the ________. 4) What kind of tissue is the forerunner of long bones in the embryo? 5) In bone formation, a deficiency of growth hormone will cause ________. A) inadequate calcification of bone B) decreased osteoclast activity C) decreased proliferation of the epiphyseal plate cartilage D) increased osteoclast activity
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