Which statement correctly describes a property of white light? a. it contains different wave lengths of visible light b. it allows light waves to be transmitted c. it makes all objects appear white d. it contains all waves on the electromagnetic spectrum

1. beginning with all chambers of the heart in the "relaxed" phase, describe the cardiac cycle in mammals, with systole and diastole of the atria and ventricles. for each time point in the cycle you select, state the following: • whether the atria and ventricles are contracting or relaxing • whether the av valves and semilunar valves are closed or open • whether the pressure in the atria and ventricles is high or low