Alveolar surfactant Physiological effect of surfactant Reduces surface tension Maintains the stability of the alveoli in different sIze Keeps the dryness of the alveoli Eases expansion of lung(increases compliance)Alveolar surfactant ◼ Physiological effect of surfactant Reduces surface tension – Maintains the stability of the alveoli in different size – Keeps the dryness of the alveoli – Eases expansion of lung (increases compliance)