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5 Written Questions

5 Matching Questions

  1. Paget's disease
  2. bone deposition
  3. when we are incapacitated...
  4. blood vessels
  5. functions of bone
  1. a accomplished by osteoblasts
    - cells lay down organic osteoid on bone surfaces and calcium salts crystallize within this osteoid
  2. b bone is resorbed because it is not needed to support the body
  3. c bones are well vascularized
    - 3-11% of the blood in the body is in the skeleton
  4. d characterized by excessive rates of bone deposition and bone resorption
    - makes the bones soft and week
    - activity of soteoblasts outpaces that of osteoclasts: bones can thicken, but in an irregular manner, and the medullary cavities may fill with bone
  5. e (1) support
    (2) movement: skeletal muscles attach to the bones by tendons and use the bones as levers to move the body and its parts; support and movement are mutually dependent functions
    (3) protection
    (4) mineral storage: most important are calcium and phosphate
    (5) blood cell formation and energy storage: red marrow makes the blood cells and yellow marrow is a site of fat storage
    (6) energy metabolism: osteoblasts secrete a hormone that influences blood sugar regulation; the hormone (osteocalcin) stimulates pancreatic secretions that reduce blood sugar levels (insulin)

5 Multiple Choice Questions

  1. internal spongy bone in flat bones
  2. resists both strong compression and strong tension (pulling) forces; occurs in certain ligaments and certain cartilages that experience both these forces; consists of thick collagen fibers (as in dense regular connective tissue) surrounding the chondrocytes within lacunae; found in anulus fibrosus portion of the discs between the vertebrae and in the articular discs of some joints (ex: menisci of the knee)
  3. roughly cube-shaped
    - occur in the wrist and ankle
  4. most abundant; provides support through flexibility and resilience; makes up the articular cartilage that covers the ends of adjoining bones in movable joints; forms the cartilaginous attachments of the ribs to the sternum; accounts for most of the cartilage found in the respiratory structures; forms the embryonic skeleton
  5. other bones develop as hyaline cartilage, which is replaced through this process
    - bones are: endochondral bones or cartilage replacement bones

5 True/False Questions

  1. compoundinternal spongy bone in flat bones


  2. when we are physically active...bone is resorbed because it is not needed to support the body


  3. nutrient artery and nutrient veinreduction: realignment of the broken bone ends


  4. osteon (Haversian system)form of bone cancer
    - usually originates in a long bone of the upper or lower limb


  5. medullary cavityvarious shapes
    - ex: vertebrae and hip bones


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