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Chapter 7 Questions

Explain how the development of intramembranous bone differs from that of endochondral bone. (204) intramembranous are bones that originate within sheetlike layers of connective tissues; endochonral bones begin as masses of cartilage and later is replaced by bone tissue
Explain how osteoblasts and osteoclasts regulate bone mass. (208) osteoclasts remove the calcified matrix around the cartilage then osteoblasts invade the region and deposit bone tissue in place of the the cartilage
Explain the mechanism that regulates the concentration of blood calcium ions. (211) when calcium is low, parathyroid hormone stimulates osetoclasts to break down bone which releases calcium into the blood when calcium is high, calcitonin activates osteoblasts to form bone tissue, storing calcium in the matrix
Bones of the head, neck, and trunk compose the _________ skeleton; bones of the limbs and their attachments compose the _________ skeleton. (214) axial; appendicular
Explain the importance of fontanels. (226) fontanels allow the head to change shape so the head can pass through the birth canal
Describe a typical vertebra, and distinguish among the cervical, thoracic, and lumbar vertebrae. (228) cervical- spinous processes, axis and atlas thoracic-processes project at sharp angles, articulate with ribs lumbar-processes project laterally, short thick processes
Name the bones of the upper limb, and describe their locations. (236) humerus, ulna, radius, carpals, metacarpals, phalanges
Explain the major differences between the male and female skeletons. (242) males have larger, heavier skulls while female skulls are saller and more delicate males have heavier, thicker pelvieses while females have lighter pelvises with wider pubic arches for child birth
Created by: wmisaacharris



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