<prompt> Compliance is greatest during which stage of breathing?Sta of inspirationMid inspirationEnd of inspirationExpiration  <response>: Extent to which lungs will expand for each unit increase in transpulmonary pressure is called LUNG COMPLIANCE. COMPLIANCE a 1 Surface tension Surface tension is decreased by surfactant. At sta of inspirationEnd of expiration, alveoli are smallest and surfactant is concentrated in alveoli ,Surface tension is least and Compliance is maximum. At end of inspiration, alveoli are large and surfactant is scattered,Surface tension is high and compliance is less. . 