Outline the non-respiratory functions of the lung.
In general, this question was not well answered. In particular candidates did not demonstrate sufficient depth of information. Nunn’s Applied Respiratory Physiology devotes an entire chapter to this topic (Ch.12, in the 6th edition).
With these sorts of college remarks, one is hardly able to guess what the marking criteria had contained. One can only assume that the examiners wanted something like the contents of Nunn's, except condensed into a ten-minute answer.
Thus, the nonrespiratory functions of the lungs are:
Heinemann, H. O., and A. P. Fishman. "Nonrespiratory functions of mammalian lung." Physiological Reviews 49.1 (1969): 1-47.
Harada, Ruth N., and John E. Repine. "Pulmonary host defense mechanisms." Chest 87.2 (1985): 247-252.
Chitkara, Rajinder K., and Faroque A. Khan. "Endocrine Functions of the Lung." Hormonal Actions in Non-endocrine Systems. Springer, Dordrecht, 1983. 147-199.