<prompt> Feature of shock lung isDiffuse alveolar damageUsual interstitial infiltratesOrganizing pneumoniaBronchiolitis  <response>: In ARDS, the presence of alveolar and interstitial fluid and the loss of surfactant can lead to a marked reduction of lung compliance. Without an increase in end-expiratory pressure, significant alveolar collapse can occur at end-expiration,with consequent impairment of oxygenation. Ref Davidson edition23rd pg 199 