The emotions, then, are the preparation for phylogenetic activities (Fig. 48). If the activities were consummated, the fuel--glycogen-- and the activating secretions from the thyroid, the adrenals, the hypophysis, would be consumed. In the activation without action these products must be eliminated as waste products and so a heavy strain is put upon the organs of elimination. It is obvious that the body under emotion might be clarified by active muscular exercise, but the subject of the emotion is so strongly integrated thereby that it is difficult for him to engage in diverting, clarifying exertion. * * * * * * * * * * * * * * * * * * * * So, as we have indicated already, certain deleterious effects are produced when the body mechanism is activated without resultant action. For example, the output of adrenalin is increased, and, as a consequence, arteriosclerosis and cardiovascular disease may occur in persons who have been subjected to prolonged emotional strain, since it has been proved that the prolonged administration of adrenalin will cause these conditions. We have stated that the emotions cause increased output of glycogen. Glycogen is a step toward diabetes, and therefore this disease, too, is prone to appear in persons under emotional strain. It is most common in those races which are especially emotional in character, so we are not surprised to find it especially prevalent among Jews. So common is this particular result of prolonged emotion that some one has said, "When the stocks go down in New York, diabetes goes up." Nephritis, also, may result from emotional stress, because of the strain put upon the kidneys by the unconsumed activating substances. The increased heart action and the presence of these activating secretions may cause myocarditis and heart degeneration. Claudication also may result from the impaired circulation. The emotions may cause an inhibition of the digestive secretions and of intestinal peristalsis. This means that the digestive processes are arrested, that putrefaction and autointoxication will result, and that still further strain will thus be put upon the organs of elimination. Who has not observed in himself and in others when under the influence of fear, anger, jealousy, or grief that the digestive processes and general well-being are rapidly and materially altered; while as tranquillity, peace, and happiness return the physical state improves accordingly? Dentists testify that as a result of continued strong emotion the character of the saliva changes, pyorrhea develops, and the teeth decay rapidly. Every one knows that strong emotion may cause the hair to fall out and to become prematurely gray.