Physiology When a normal subject develops a spontaneous pneumothorax of his right lung, you would expect the following to occur: A Right lung contracts B Chest wall on the right contracts C Diaphragm on the right moves up D Mediastinum moves to the right 💡 Explanation When a normal subject develops a spontaneous pneumothorax of his right lung, you would expect the following to occur: ✓ Correct Answer: A. Right lung contracts