1 Tap water is a mixture of water and other particles. Pure water or H2O is generally referred to as distilled water.  Many of the substances we come into contact with every day are mixtures including the air we breathe which is a mixture of gases like oxygen and nitrogen.
Effect of epinephrine on glucose metabolism in humans: contribution of the liver. Abstract. Epinephrine causes a prompt increase in blood glucose concentration in the postabsorptive state. This effect is mediated by a transient increase in hepatic glucose production and an inhibition of glucose disposal by insulin-dependent tissues. Epinephrine augments hepatic glucose production by stimulating glycogenolysis and gluconeogenesis.
Plasma epinephrine concentration increases during aerobic exercise in proportion to the intensity of the exercise. Anaerobic exercise provokes even greater concentration increases (see Metaboreflex). In the curve above, anaerobic metabolism probably contributed to the steep epinephrine increase seen at 200 Watts and above. Heart rates were 175 to 180 beats per minute at the most strenuous level of exercise. Plasma epinephrine concentration increases very rapidly at the beginning of exercise. But when exercise targets a specific workload, epinephrine increases even further, but less rapidly, over time, as shown below. The workload in this case was 67% of maximum O2 uptake.