In one group, the euglycemic/hyperinsulinemic consists of a situation in which insulin levels are above physiological levels and blood glucose levels maintained at approximately 100 mg/dL. Euglycemic/hyperinsulinemic clamp is similar to the way the hyperinsulinemic/hyperglycemic clamp is performed, although reaching a glucose level of approximately 150 mg/dL. During the clamp with hypoinsulinemia/hyperglycemia, will be infused a somatostatin analogue (octreotide) for 30 minutes (t = 0 min) and subsequently infusion of 20% glucose to achieve glycaemia of approximately 150 mg/dL (t = 30 min).