A 41-year-old woman has been diagnosed as having a loose body of ...

[2125004343]

A 41-year-old woman has been diagnosed as having a loose body of cartilage in her left knee. What data would most likely lead clinicians to this conclusion?
 
  A)
  A visible hematoma is present on the anterior portion of the knee.
  B)
  The woman experiences intermittent, painful locking of her joint.
  C)
  Computed tomography indicates a complete tear of her knee ligament.
  D)
  An x-ray shows that her femoral head and tibia are no longer articulated.

Question 2

After falling off his bicycle, an 8-year-old boy has a large abrasion on his posterior thigh that has removed the epidermis in the region but left the dermis largely intact.
 
  Which of the following changes in integumentary system would be expected in the area of his wound?
  A)
  Profuse bleeding from removal of his epidermis
  B)
  Fewer Merkel and Langerhans cells in the region
  C)
  Exposure of the underlying subcutaneous tissue
  D)
  Removal of hair follicle roots from the area of the wound bed

[Ptupou85]

Answer to Question 1

Ans:
B

Feedback:

The symptoms of loose bodies are painful catching and locking of the joint. The loose body repeatedly gets caught in the crevice of a joint, pinching the underlying healthy cartilage. A tear of her ligament, a hematoma, or a lack of articulation is not as closely associated with the presence of loose bodies in a joint.

Answer to Question 2

Ans:
B

Feedback:

Merkel cells and Langerhans cells are components of the epidermis. Bleeding may be minimal since the epidermis is avascular. Subcutaneous tissue is below the dermis and would not be directly exposed, and hair follicle roots exist at a deeper level than the epidermis.