What is the condition of the valves of the heart when the right ventricle is contracting?

D

Some teachers pointed out that in question 19, answer C is correct for a small proportion of the cardiac cycle at the start of ventricular systole. There is an isovolumetric phase when both the atrioventricular and semi lunar valves are closed and contraction of the ventricles causes a very rapid pressure increase. However, D was much the best answer. Most candidates chose it and the question discriminated well.