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General Surgery · Wound healing: role of macrophages
Sample itemWhich cell is considered the key orchestrator that bridges the inflammatory and proliferative phases of wound healing?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
B. Macrophage
Neutrophils dominate the first day or two, clearing bacteria and debris, whereas macrophages arrive by 48 to 72 hours and secrete growth factors that recruit fibroblasts and stimulate angiogenesis. Macrophage depletion impairs healing. Fibroblasts then lay down collagen in the proliferative phase.
Option by option
A. Eosinophil
Eosinophils are not central to normal healing.
B. Macrophage (correct)
Correct. Macrophages coordinate the transition to repair.
C. Neutrophil
Neutrophils act mainly in the earliest phase.
D. Mast cell
Mast cells have a minor role.
Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.
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