Teachers.io

1. The right ventricle of the heart is less muscular than the left ventricle.

i) Explain the effect that this has on blood going to the lungs (2 marks)

ii) What is the advantage of this effect (2 marks)

1. Explain how the cardiac control centre increases heart rate via neural control. (3 marks)

1. Explain the benefits of good venous return to an athlete (3 marks)

1. The skeletal pump mechanism is one way of helping to maintain venous return. Describe 3 other mechanisms involved in venous return. Explain the importance of the skeletal pump mechanism during an active cool down. (10 marks)

TOTAL Ð 20 MARKS