Pathology Delayed prolonged increase in vascular permeability in inflammation is due to: A Interleukin 1 mediated endothelial retraction B Increased transcytosis C Leakage from newly formed blood vessels D Release of histamine causing endothelial contraction 💡 Explanation Delayed prolonged increase in vascular permeability in inflammation is due to: ✓ Correct Answer: A. Interleukin 1 mediated endothelial retraction