PATHOLOGY MCQ
HEALING AND REPAIR
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The end of each piece of bone becomes brittle and dies
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The bone begins producing new tissue to bind the break
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Marrow from inside the bone begins leaking into the break
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Nothing happens, so the bone has to be glued together by the doctor
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Detailed explanation-1: -Immediately after fracture, blood from ruptured vessels inside the bone starts to coagulate into a swollen mass called a haematoma. At this early stage, it is crucial that the fragments of bone are guided back into place to ensure that they are correctly aligned and to help stem the loss of blood.
Detailed explanation-2: -First, inflammation occurs after the injury. Then the bone is induced to repair and is forming soft callus. At the third step the bone gets stronger and forms hard callus. At the last step, the new compact bone is formed and blood vessels regenerate.
Detailed explanation-3: -Soon after a fracture occurs, the body acts to protect the injured area, and forms a protective blood clot and callus around the fracture. New “threads” of bone cells start to grow on both sides of the fracture line. These threads grow toward each other. The fracture closes and the callus is absorbed.
Detailed explanation-4: -In the first few days after a fracture, the body forms a blood clot around the broken bone to protect it and deliver the cells needed for healing. Then, an area of healing tissue forms around the broken bone. This is called a callus (say: KAL-uss). It joins the broken bones together.
Detailed explanation-5: -There are three stages of bone healing: the inflammatory, reparative, and remodeling stages.