Thermoregulation (Edexcel GCSE Biology): Flashcards
📚Flashcards
Practise the cards
13 cards from this deck
ShowHide
Practise the cards
13 cards from this deck
Thermoregulation definition
Thermoregulation definition
Process by which the body maintains stable internal temp (around 37°C)
Normal body temp maintained by thermoregulation
Normal body temp maintained by thermoregulation
37°C
Location of thermoregulatory centre
Location of thermoregulatory centre
Hypothalamus (in the brain)
What thermoregulatory centre monitors
What thermoregulatory centre monitors
Temperature of the blood
Location of temperature receptors
Location of temperature receptors
In the skin
Shivering definition
Shivering definition
Involuntary contraction of skeletal muscles when body is cold
How shivering generates heat
How shivering generates heat
Muscle contraction uses energy; respiration releases heat
Vasoconstriction definition
Vasoconstriction definition
Narrowing of blood vessels near skin surface
Purpose of vasoconstriction
Purpose of vasoconstriction
Reduces blood flow to skin, reducing heat loss
Vasodilation definition
Vasodilation definition
Widening of blood vessels near skin surface
Purpose of vasodilation
Purpose of vasodilation
Increases blood flow to skin, increasing heat loss
Effect on enzymes when temp below 37°C
Effect on enzymes when temp below 37°C
Enzymes slow down
Effect on enzymes when temp above 37°C
Effect on enzymes when temp above 37°C
Enzymes denature