Read the description of the case study. Answer the questions below based on the case study information. Mrs. Debbie Morgan is a 45-year-old female who works as a stocki
Read the description of the case study.
Answer the questions below based on the case study information.
Mrs. Debbie Morgan is a 45-year-old female who works as a stocking clerk for a local home improvement store. While she was at work today a large box of metal rivets fell from a 20-ft.-high overhead shelf, striking her outstretched arm and knocking her to the ground. The ambulance personnel reported that she had lost quite a bit of blood at the accident scene and was “knocked out” when they arrived. To minimize further hemorrhage, the paramedics applied a pressure bandage to her arm.
You meet the paramedics as they bring Mrs. Morgan into the emergency room and begin to assess her for injuries. She is awake and alert, but complaining of severe left arm and back pain, plus she has a “killer headache.” To fully examine her injuries you remove four blood-soaked bandages from her arm. You notice a large open wound on her arm with what appears to be bone tissue sticking out of the skin. She also has bruises covering her left shoulder, left wrist, and lower back. To determine the extent of her injuries Mrs. Morgan undergoes several x-rays, which reveal the following:
fracture of the left humerus at the proximal diaphysis,
depressed fracture of the occipital bone,
fracture of the 3rd lumbar vertebral body,
Questions:
Diagram where Mrs. Morgan’s fractures are located.
Describe the types of bone tissue present at each of Mrs. Morgan’s fractures. Are they all the same? What makes them the same or different?
Mrs. Morgan has extensive bleeding at the injury on her arm. Where is the blood coming from? Is she likely to have bleeding at the other fracture sites? Why might it not be as obvious as the bleeding observed on her arm?
Describe the steps that will occur as Mrs. Morgan’s fractures heal.
Bone remodeling occurs on a regular basis. It is one of the reasons that after a period of time there will be little evidence of any of Mrs. Morgan’s fractures. Describe which cells are actively participating in bone remodeling. What will happen if homeostasis between these cell types is disrupted (i.e. one of these cell types becomes more active than the others)?
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