The parathyroid gland releases a hormone that dissolves some of the calcium in bones moving it to the blood. This is a result of an increasing number of osteoclasts which results in the release of calcium ions into the bloodstream.
An enzyme known as amylase is found ins the saliva of humans. This enzyme helps to begin the process of digesting starch molecules in the foods we eat. The best description of how enzymes like amylase help in the process of digestion would be that Amylase is a catalyst that speeds up the chemical process of breaking down food molecules.
Most scientific questions are based on observations.
Scanning Tunnel Microscope