<prompt> Increased lung compliance is seen in:EmphysemaBronchial asthmaChronic bronchitisBronchiectasis  <response>: Ans: A Emphysema Ref: Harrisons 18th edn. pg 2087Explanation:Lung compliance: is defined as change in lung volume for every unit change in pressureCompliance stretchabilitv 1 elasticitystiffnessGreater the compliance easier for the lungs to expandCompliance depends upon tissue elasticity 25 surface tension 75Surfactant synthesized by alveolar type 2 cellsIncreased collagen decrease complianceRestrictive lung disease fibrosis increases collagen decreases complianceObstructive lung disease emphysema collagen and elasticity decrease increases complianceCompliance increases with ageLaplaces law states collapsing pressure is inversely proportional to the radius of the alveoliEmphysema: Increased RV FRCRestrictive lung: Decreased FRC TLC 