A nurse working in labor and delivery is aware that newborns have several physiologic mechanisms that increase heat production to prevent hypothermia. What is true regarding newborn thermogenesis?
A) Shivering occurs when skin receptors perceive a drop in the environmental temperature and transmit sensations to stimulate the sympathetic nervous system.
B) Shivering thermogenesis uses the newborn's stores of brown fat to provide heat.
C) Brown fat produces heat generation, and heat transfer to the peripheral circulation.
D) The extra muscular activity by the infant in cold stress produces a large amount of body heat.
Answer: C
In the infant, non-shivering thermogenesis (NST) occurs when skin receptors perceive a drop in the environmental temperature and transmit sensations to stimulate the sympathetic nervous system. NST uses the newborn's stores of brown fat to provide heat. Brown fat produces heat generation, and heat transfer to the peripheral circulation. The extra muscular activity by the infant in cold stress does not produce body heat.
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