Nokea
A child is growing at a rate appropriate for his age. What cells are responsible for the secretion of bone matrix that eventually results in bone growth?
- A. Osteoblasts
- B. Osteocytes
- C. Osteoclasts
- D. Lamellae
Correct Answer: A
Rationale: Osteoblasts function in bone formation by secreting bone matrix. Osteocytes are mature bone cells and osteoclasts are multinuclear cells involved in dissolving and resorbing bone. Lamellae are circles of mineralized bone matrix.
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A nurse is caring for an older adult who has been diagnosed with geriatric failure to thrive. This patient's prolonged immobility creates a risk for what complication?
- A. Muscle clonus
- B. Muscle atrophy
- C. Rheumatoid arthritis
- D. Muscle fasciculations
Correct Answer: B
Rationale: If a muscle is in disuse for an extended period of time, it is at risk of developing atrophy, which is the decrease in size. Clonus is a pattern of rhythmic muscle contractions and fasciculation is the involuntary twitch of muscle fibers; neither results from immobility. Lack of exercise is a risk factor for rheumatoid arthritis.
A patient has been experiencing progressive increases in knee pain and diagnostic imaging reveals a worsening effusion in the synovial capsule. The nurse should anticipate which of the following?
- A. Arthrography
- B. Knee biopsy
- C. Arthrocentesis
- D. Electromyography
Correct Answer: C
Rationale: Arthrocentesis (joint aspiration) is carried out to obtain synovial fluid for purposes of examination or to relieve pain due to effusion. Arthrography, biopsy, and electromyography would not remove fluid and relieve pressure.
A patient injured in a motor vehicle accident has sustained a fracture to the diaphysis of the right femur. Of what is the diaphysis of the femur mainly constructed?
- A. Epiphyses
- B. Cartilage
- C. Cortical bone
- D. Cancellous bone
Correct Answer: C
Rationale: The long bone shaft, which is referred to as the diaphysis, is constructed primarily of cortical bone.
A nurse on a patient has been experiencing significant pain in her knee and diagnostic imaging reveals an effusion in the synovial capsule. What intervention should the nurse anticipate?
- A. Arthrography
- B. Knee replacement
- C. Arthrocentesis
- D. Arthroscopy
Correct Answer: C
Rationale: Arthrocentesis (joint aspiration) is carried out to obtain synovial fluid for examination or to relieve pain due to effusion. Arthrography is used to visualize joint structures, not to remove fluid. Arthroscopy is a diagnostic visualization, and knee replacement is not indicated for effusion.
An older adult patient has symptoms of osteoporosis and is being assessed during her annual physical examination. The assessment shows that the patient will require further testing related to a possible exacerbation of her osteoporosis. The nurse should anticipate what diagnostic test?
- A. Bone densitometry
- B. Hip bone radiography
- C. Computed tomography (CT)
- D. Magnetic resonance imaging (MRI)
Correct Answer: A
Rationale: Bone densitometry is considered the most accurate test for osteoporosis and for predicting a fracture. As such, it is more likely to be used than CT, MRI, or x-rays.