Nonshivering Thermogenesis is Accomplished By

Question

Nonshivering thermogenesis is accomplished by
A) involuntary contraction of skeletal muscles.
B) constriction of the dermal blood vessels.
C) metabolism associated with brown fat.
D) involuntary contraction of the arrector pili muscles.

Accepted Answer

Nonshivering thermogenesis is the process of producing heat without shivering. This is achieved through the metabolism of brown fat, which contains a high concentration of mitochondria and uncoupling protein 1 (UCP1). When UCP1 is activated, instead of producing ATP, energy is dissipated as heat. This process is controlled by the sympathetic nervous system and can help regulate body temperature in response to cold temperatures or other thermogenic stimuli.