Physiology A normal subject makes an inspiratory effo against a closed airway. You would expect the following to occur: A Tension in the diaphragm decreases B The internal intercostal muscles become active C Intrapleural pressure increases (becomes less negative) D Pressure inside the pulmonary capillaries falls 💡 Explanation A normal subject makes an inspiratory effo against a closed airway. You would expect the following to occur: ✓ Correct Answer: D. Pressure inside the pulmonary capillaries falls