First change seen in acute inflammation is:September 2009: (A) Increased permeability, (B) Vasodilation, (C) Neutrophil migration, (D) Vasoconstriction
Answer is D. Ans. D: VasoconstrictionCardinal signs:Rubor (redness) due to dilatation of aeriolesCalor (heat)Dolor (pain) due to pressure on nerve endings by edema fluid and chemical mediator bradykinineTumor (swelling) due to edema.Functio laesa (loss of function) due to inhibition of movement by pain and tissue necrosis.