When the ventricles are contracting you would expect:Question 2Select one or more:a.Blood to be moving through the aorta and pulmonary trunk.b.The semilunar valves to be closed.c.Pressure in the ventricles to be lower than the pressure in the aorta and pulmonary trunk.d.The atria to be in diastole.e.The atrioventricular valves to be open.

When the ventricles are contracting, also known as ventricular systole, the following events would be expected:

a. Blood to be moving through the aorta and pulmonary trunk: This is true. During ventricular systole, the ventricles contract, pushing blood into the aorta and pulmonary trunk.

b. The semilunar valves to be closed: This is false. The semilunar valves (which include the aortic valve and the pulmonary valve) open during ventricular systole to allow blood to be ejected from the heart into the aorta and pulmonary trunk.

c. Pressure in the ventricles to be lower than the pressure in the aorta and pulmonary trunk: This is false. During ventricular systole, the pressure in the ventricles is higher than in the aorta and pulmonary trunk. This high pressure forces the semilunar valves to open, allowing blood to be ejected from the heart.

d. The atria to be in diastole: This is true. While the ventricles are in systole (contracting), the atria are in diastole (relaxing). This allows the atria to fill with blood in preparation for the next cardiac cycle.

e. The atrioventricular valves to be open: This is false. The atrioventricular valves (which include the mitral valve and the tricuspid valve) close during ventricular systole to prevent the backflow of blood into the atria as the ventricles contract.

So, the correct answers are a and d.