An endocrine hormone is a molecule produced by a hormone-secreting gland and carried by the blood to another organ, whose behavior it controls. Generally, the Hormone plugs into a specific receptor protein in the target cell, changing the shape of the receptor protein and thereby, producing a change in cell function. Hormones are used to communicate between organs and tissues to regulate physiological and behavioral activities, such as digestion, metabolism, respiration, tissue function, sleep, excretion, lactation, stress, growth and development, movement, reproduction and mood. It is also possible for a cell to produce a hormone to control activity within itself…