Question 3
FA person fell into the sea. The temperature of the water was 10 ∘C10\ ^{\circ}\text{C}10 ∘C. The person was rescued after 40 minutes.
The Figure shows the core body temperature of the person.
Figure
a.[1]
Calculate the decrease in core body temperature between 0 minutes and 40 minutes.
b.[2]
The person began to shiver soon after falling into the water.
Explain why shivering did not stop the core body temperature falling.
c.[2]
A core body temperature below 35 ∘C35\ ^{\circ}\text{C}35 ∘C is very dangerous. A person with this body temperature becomes slow and confused.
Suggest why.
d.[2]
After the rescue, the person was wrapped in a foil blanket.
Suggest how the foil blanket helped the core body temperature to rise.
7.3 Homeostasis and thermoregulation Questions
44 exam-style questions on Edexcel GCSE Biology 7.3 Homeostasis and thermoregulation, covering 7.3.1 Importance of a constant internal environment, 7.3.2 Importance of homeostasis, 7.3.3a Thermoregulation via the skin and hypothalamus, and 7.3.3b Vasoconstriction and vasodilation in thermoregulation. Each one has a worked solution and a mark scheme showing where the marks go.