<prompt> What is produced by lung tissue to be used in lungs?Angiotensin IReninSurfactantAngiotensin II  <response>: Ans. isci.e., SurfactantAmong the given options, two substances are formed in lung-Surfactant: Used by lungs alveoli to reduce surface tension.Angiotensin II : ACE in lungs conve angiotensin I to angiotensin II. But angiotensin II mainly acts on blood vessels, kidney and adrenal coex. 