6B. Regulation of Body Temperature
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4 ways to lose or gain heat
Radiation, Evaporation, Conduction, and Convection.
Conduction
the transfer of heat through physical contact with another object
Convection
the transfer of heat via the movement of a liquid or gas between areas of different temperature
Evaporation
the loss of heat via the conversion of water from liquid to gas
Radiation
The transfer of heat via electromagnetic waves
Equation
Total heat change = heat in + metabolic heat – heat out
Endotherm (warm-blooded)
able to generate the majority of heat energy internally using metabolic processes
Ectotherm (cold-blooded)
produce very little metabolic energy, relies on environmental sources for heat
Too hot (Stimulus-Response Model)
Stimulus increase in internal body temperature Receptor thermoreceptor Modulator hypothalamus. Effector cerebral cortex Response change in behaviour - such as turning on the fan
Too cold (Stimulus-Response Model)
Stimulus decrease in internal body temperature Receptor thermoreceptor Modulator hypothalamus Effector cerebral cortex Response change in behaviour - such as putting a jumper on