Inflammation and repair · USMLE Step 1

Which extracellular matrix component helps form the initial scaffold for migrating cells during early wound healing?

  1. Type I collagen
  2. Elastin
  3. Fibronectin
  4. Keratin
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Correct answer: Fibronectin

Fibronectin binds to fibrin and forms a provisional matrix that supports cell migration and organization early in wound healing.

Difficulty: Medium Question 6 of 22

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