A person has damaged sweat glands over a large area of skin. The hypothalamus still detects increases in blood temperature normally.
Which statement explains why the person is more likely to overheat during exercise?
A receptor is damaged, so the hypothalamus cannot detect warmer blood.
A coordination centre is damaged, so the skin cannot receive any impulses.
An effector is damaged, so less sweat is available for evaporative cooling.
An insulating layer is damaged, so less heat is released by respiration.
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.