Physiology Difference in the trajectory between inspiratory and the expiratory loop in the compliance curve is due to: A Difference between alveolar pressure during inspiration and expiration B Difference between concentration of the surfactants during inspiration and expiration C Difference in airway resistance during inspiration and expiration D Inspiration is active and expiration is passive 💡 Explanation Difference in the trajectory between inspiratory and the expiratory loop in the compliance curve is due to: ✓ Correct Answer: B. Difference between concentration of the surfactants during inspiration and expiration