Final Exam - Thermoregulation Flashcards
heat production
thermogenesis
heat loss
thermolysis
maintenance - thermogenesis
Vasoconstriction
Shivering
Piloerection
Curling up
maintenance - thermolysis
vasodilation
sweating
pilorelaxation
stretching out
Effect of shivering
increase metabolism –> similar to light exercise
increase heat production by 500%
Target organs of nonshivering thermogenesis
brown adipose tissue (BAT) + skeletal muscle
- skeletal muscle = primary in adults
- BAT = primary in infants
Net energy moves from ____ to _____
warmer object to cooler object
Mechanisms of heat loss
Radiation
Evaporation
Convection
Conduction
Latent heat of vaporization
Evaporization
Most heat loss occurs d/t
radiation
Radiation
Heat loss by transfer of photons
NOT to surrounding air
Evaporization
insensible water evaporation from skin/lungs
1/2 d/t respiratory loss
Decrease radiation heat loss by
incubator/barrier between patient/object
decrease evaporation heat loss by
humidification, covering exposed skin, using warm preps
conduction
heat loss thru contact with cooler object
conduction requires
direct contact