State the blood flow to the skeletal muscles in the student when he is sitting down, using Fig. 3.1.
State the names of two organs in the body whose blood flow is not represented on the graph.
Using Fig. 3.1 and Fig. 3.2, calculate the percentage increase in blood flow to the skeletal muscles when the student exercises. Show your working.
When exercise begins, the muscles require more energy. Name two chemicals that the muscles take from the blood to release energy for contraction.
Explain why blood flow to the heart muscle increases when a person exercises.
Describe the blood-flow changes that take place in the alimentary canal and the skin during exercise.
Suggest a reason for the blood-flow change in the alimentary canal during exercise.
Explain why blood flow to the skin changes during exercise.