First to appear in acute inflammation is ?: (A) Vasodilatation, (B) Increased vascular permeability, (C) Vasoconstriction, (D) Decreased vascular permeability
Answer is A. The sequence of events in acute inflammation is: Transient vasoconstriction ---- Vasodilatation ----- Increased permeability followed by Stasis Reference: Robbins and Cotran Pathologic Basis of Disease; 9th edition.