Which of the following compounds promote osteoclast formation?

The semilunar valves open when the

A) impulse arrives at the AV node. B) atrial and ventricular pressures are equal. C) atrial pressure exceeds the ventricular pressure. D) ventricular pressure exceeds the aortic and pulmonary arterial pressures.

An individual who understands all aspects of the change process and provides help where needed is called a ________

A) Catalyst B) Solution-giver C) Resource linker D) Process helper E) None of the above