chapter 6
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| a function of the skeleton system is? | 1. body support and muscle attachment
2. calcium regulation
3. protectin of internal organs
4. blood cell production
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| the carpal bones are examples of ____ bones | short
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| a rib is an example of ____ bone | flat
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| this bone is classified as a "irregular" in shape | vertebra
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| bones that develop within tendons are called ___ bones | sesamoid
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| blood cell formation occurs in | red bone marrow
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| teo-thirds of the weight of bone is accounted for by: | calcium phosphate
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| the membrane found wrapping the bones, at the joint cavity, is the: | periosteum
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| immature cells that secrete the organic components of the bone matrix are called: | osteoblasts
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| ___ are cells responsible for dissolving bone matrix | osteoclasts
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| ___ are stem cells whose divisions produce new bone cells | osteoprogenitor cells
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| the central canal of an osteon contains: | blood vessels
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| the interconnecting tiny plates and struts of bone tissue found in spongy bone are called: | trabeculae
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| during endochondral ossification of long bones, the primary ossification centers form in the __ ans the secondary ossification centers form in the __ | diaphyses; epiphyses
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| intramembranous ossification results initially with the formation of: | spongy bone
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| what structure allows a bone to grow in length? | epiphyseal plate
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| the lining of the medullary cavity of a long bone is called the: | endosteum
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| the presence of an epiphyseal line indicates: | epiphyseal growth has ended
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| the articular cartilage of a typical long bone is composed of what type of cartilage? | hyaline cartilage
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| the nonpathological loss of bone that occurs with aging is called: | osteoporosis
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| which of the following conditions would you possibly observe in a child who is suffering from rickets? | bowed legs
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| after a fracture of the diaphysis has healed, the thickened region that results is called the: | external callus
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| mary is 50 years old and has entered menopause. during a checkup, a bone scan reveals the beginnings of osteoporosis. her physician suggest nutritional therapy. what might she recommend for her patient? | - vitamin C
- vitamin D
- calcium supplements
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| in bone, calium phosphate interacts with calcium hydroxide to form crystals of: | hydroxyapatite
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| the hormone calcitonin __ blood calcium levels and parathyroid hormone __ blood calcium levels. | decrease; increase
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| which hormone promotes bone-building? | calcitonin
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| in normal adult bone, a portion of the protien and minerals content is replaced each year. both osteoblasts and osteoclasts are involved in this process called ___ | remodeling
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| a lack of exercise would: | result in thin and brittle bone
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| how would removing hydroxyapatite from bone matrix affect physical characteristics of a bone? | the bone would be more flexible
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| on average, women are short than men due to: | - earlier epiphyseal closure
- higher levels of estrogen
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