CHAPTER XI

THE UTILITY OF THE BODILY CHANGES IN PAIN AND GREAT EMOTION

The reflex nature of bodily responses in pain and the major emotions, and the useful character of reflexes--The utility of the increased blood sugar as a source of muscular energy--The utility of increased adrenin in the blood as an antidote to the effects of fatigue--The question whether adrenin normally secreted inhibits the use of sugar in the body--The vascular changes produced by adrenin favorable to supreme muscular exertion--The changes in respiratory function also favorable to great effort--The effects produced in asphyxia similar to those produced in pain and excitement--The utility of rapid coagulation in preventing loss of blood 184-214