nonshivering
Calm heat production
Nonshivering describes heat production in the body that doesn't involve muscle contractions.
Brown fat generates warmth through nonshivering thermogenesis, a process especially important in infants and hibernating animals: Newborns rely on nonshivering thermogenesis to maintain body temperature.
thermogenesis
Heat-producing fatty tissue
- mitochondriaCell's energy-producing organelles
- energy expenditurePower used by activity
- thermoregulationMaintaining stable internal heat
- metabolic rateBody's energy consumption pace
regulation
Alertness and stress hormone
- sympathetic nervous systemAutonomic division activating arousal
- hypothalamusSubthalamic regulatory brain region
- thyroxineThyroid-produced metabolic hormone
- thyroid hormoneMetabolism-controlling endocrine secretion
infants
Infant just delivered
- neonateInfant under 28 days
- thermal protectionDefense against temperature extremes
- warmingIncreasing in temperature
- incubatorControlled warming enclosure
brown fat
Heat-producing fatty tissue
- mitochondriaCell's energy-producing organelles
- energy expenditurePower used by activity
- thermoregulationMaintaining stable internal heat
norepinephrine
Alertness and stress hormone
- sympathetic nervous systemAutonomic division activating arousal
- hypothalamusSubthalamic regulatory brain region
- thyroxineThyroid-produced metabolic hormone
thyroid hormone · leptin · cold exposure · catecholamines · feedback loop
cold tolerance
Resistance to low temperatures
- repeated exposureMultiple instances of contact
newborn
Infant just delivered
- neonateInfant under 28 days
- thermal protectionDefense against temperature extremes
- warmingIncreasing in temperature
thermoregulatory mechanism
nonshiveringshivering
Involuntary bodily trembling
trembling · shaking · quivering · convulsive