A gardener works for several hours inside a warm greenhouse. The gardener's core body temperature rises above normal.
How does vasodilation help to lower the gardener's core body temperature?
More warm blood flows close to the skin surface, so more energy is transferred to the environment.
The skin capillaries widen, so more energy is transferred from the blood to the environment.
More sweat is released onto the skin, so more energy is transferred away by evaporation.
More blood reaches the skin, so the skin cells respire faster and transfer more energy away.
7 exam-style questions on AQA GCSE Biology 5.2.4 Control of body temperature. Each one has a worked solution and a mark scheme showing where the marks go.