NR507 Week 6 Quiz

1. Question : A(n) _____ fracture is a fracture at a site of a preexisting bone abnormality, usually by a force that would not normally cause a fracture. Student Answer: idiopathic incomplete pathologic greenstick Instructor Explanation: A pathologic fracture is a break at the site of a preexisting abnormality, usually by force that would not fracture a normal bone. Points Received: 2 of 2 Comments: Question 2. Question : Which of the following attaches skeletal muscle to bone? Student Answer: Tendon Ligament Bursa Mesentery Instructor Explanation: A tendon is fibrous connective tissue that attaches skeletal muscle to bone. Points Received: 2 of 2 Comments: Question 3. Question : _____ is the temporary displacement of two bones in which the bone surfaces partially lose contact. Student Answer: Dislocation Subluxation Malunion Nonunion Instructor Explanation: Dislocation is the temporary displacement of a bone from its normal position in a joint. If the contact between the two surfaces is only partially lost, the injury is called a subluxation. Points Received: 2 of 2 Comments: Question 4. Question : Which disorder is characterized by the formation of abnormal new bone at an accelerated rate beginning with excessive resorption of spongy bone? Student Answer: Osteomalacia Paget disease Osteoporosis Osteosarcoma Instructor Explanation: Paget disease (osteitis deformans) is a state of increased metabolic activity in bone characterized by abnormal and excessive bone remodeling, both resorption and formation. Chronic accelerated remodeling eventually enlarges and softens the affected bones. Points Received: 2 of 2 Comments: Question 5. Question : What causes the crystallization within the synovial fluid of the joint affected by gouty arthritis? Student Answer: Reduced excretion of purines Overproduction of uric acid Increase in the glycosaminoglycan levels Overproduction of proteoglycans Instructor Explanation: When the uric acid reaches a certain concentration in fluids, it crystallizes, forming insoluble precipitates that are deposited in connective tissues throughout the body. Crystallization in synovial fluid causes acute, painful inflammation of the joint, which is a condition known as gouty arthritis. Points Received: 2 of 2 Comments: Question 6. Question : Rhabdomyolysis is characterized by Student Answer: paralysis of skeletal muscles resulting from impaired nerve supply. smooth muscle degeneration resulting from ischemia. lysis of skeletal muscle cells through the initiation of the complement cascade. release of myoglobin from damaged striated muscle cells. Instructor Explanation: Muscle cell damage releases the myoglobin. Points Received: 2 of 2 Comments: