A person moves from a cool room into a bath that is warmer than their skin. They remain still, and their core body temperature rises.
Which statement correctly describes the cause of this rise?
The rise in core body temperature is an external change because the bath is outside the body.
The warmer bath is an external change, but heat is transferred through the skin from the body to the bath.
The warmer bath is an external change, and heat is transferred through the skin from the bath to the body.
Increased respiration in the warm water is an internal change that releases more heat inside the body.
78 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.