Thermoregulation (Edexcel GCSE Biology Combined Science): Flashcards
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Thermoregulation definition
Thermoregulation definition
Process maintaining stable internal body temperature
Normal body temperature
Normal body temperature
37°C
Location of thermoregulatory centre
Location of thermoregulatory centre
Hypothalamus in the brain
Shivering definition
Shivering definition
Involuntary muscle contraction when body is cold
How shivering generates heat
How shivering generates heat
Muscle activity releases energy from respiration as heat
Vasoconstriction definition
Vasoconstriction definition
Narrowing of blood vessels near skin surface
Purpose of vasoconstriction
Purpose of vasoconstriction
Reduces heat loss when body is cold
Vasodilation definition
Vasodilation definition
Widening of blood vessels near skin surface
Purpose of vasodilation
Purpose of vasodilation
Increases heat loss when body is hot
Type of feedback mechanism in thermoregulation
Type of feedback mechanism in thermoregulation
Negative feedback