Temperature Control (OCR A-Level Biology A): Flashcards
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Normal human core body temp range
Normal human core body temp range
36.8 ± 0.5°C
Term for physiological control of body temp
Term for physiological control of body temp
Thermoregulation
Endotherms definition
Endotherms definition
Animals that maintain temp using heat generated within body tissues
Ectotherms definition
Ectotherms definition
Animals that absorb heat from environment to regulate temp
4 mechanisms of heat loss (RACE mnemonic)
4 mechanisms of heat loss (RACE mnemonic)
Radiation, Air currents (convection), Conduction, Evaporation
Vasodilation in thermoregulation
Vasodilation in thermoregulation
Arterioles near skin dilate, increasing blood flow to capillaries
How sweating cools the body
How sweating cools the body
Evaporation of sweat extracts heat from skin
Thyroxine's role in cold conditions
Thyroxine's role in cold conditions
Boosts basal metabolic rate (BMR), increasing heat production
Hypothalamus role in temperature control
Hypothalamus role in temperature control
Monitors core blood temp & coordinates corrective measures
Negative feedback in thermoregulation
Negative feedback in thermoregulation
Reverses actions when core body temp returns to normal