Characteristic feature of acute inflammation -
Ans. is 'c' i.e., Vasodilatation and increased vascular permeability Acute inflammation has three major steps: -Among these three major steps "The hallmark of acute inflammation is increased vascular permeability leading to escape of protein rich fluid (exudates) into the extravascular tissue".Mechanism of increased vascular permeabilityFormation of endothelial gaps in venulesDirect endothelial injury resulting in endothelial cell necrosis and detachment.Delayed prolonged leakageLeucocyte mediated endothelial injury.
Vasoconstriction
Vascular stasis
Vasodilatation and increased vascular permeability
Margination of leucocytes
Mechanisms of Cell Injury