<prompt> The specialized mammalian tissueorgan in which fuel oxidation serves not to produce ATP but to generate heat is:Adrenal glandSkeletal muscleBrown adipose tissueHeart  <response>: Ans. C. Brown adipose tissueBrown adipose tissue contains thermogenin, which is a physiological uncoupler of oxidative phosphorylation. This process is called Nonshivering Thermogenesis. 