A person in a cold room has a core temperature below the normal range. A treatment prevents the smooth muscle in skin arterioles from contracting. Shivering is unaffected.
Compared with an untreated person under the same conditions, which outcome is most likely?
More heat is lost through the skin, so more heat production may be needed.
Less heat is lost through the skin, so more heat production may be needed.
More heat is lost through the skin, so less heat production may be needed.
Less heat is lost through the skin, so less heat production may be needed.
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.