Newborn humans face thermoregulatory challenges as do small mammals.One mechanism they use to generate heat is

Question

Quizplus · Accepted Answer

Nonshivering thermogenesis in "brown fat" is the mechanism used by newborn humans and small mammals to generate heat. Brown fat contains a high concentration of mitochondria and can generate heat through the uncoupling of oxidative phosphorylation, which serves to preserve body heat in newborns. Shivering thermogenesis, convection, evaporation, and radiation are not mechanisms used by brown fat for thermoregulation.

Newborn Humans Face Thermoregulatory Challenges as Do Small Mammals