53.A 9-year-old boy receives a deep laceration over his right eyebrow playing ice hockey. The wound is cleaned and Iisutured. Which of the following describes the principal function of macrophages that are present in the wound 24 to 48 hours after injury?
|B.||Deposition of collagen|
Answer : D Phagocytosis
Macrophages arrive at the site of injury shortly after neutrophils, but they persist in the wound for days longer.
Macrophages remove debris and orchestrate the formation of granulation tissue by releasing cytokines and chemoattractants.
None of the other choices are functions of tissue macrophages. For example, plasma cells produce antibodies, and myofibroblasts mediate wound contraction.