Quick Answer. The Boxing Day tsunami that occurred on Dec. 26, 2004, was caused by an earthquake of above 9 magnitude in the Indian Ocean. The earthquake was caused by the movement of the Indio-Australian tectonic plate as it subducted below the Eurasian plate, causing the seafloor above it to lift upwards. Continue Reading.
Exubera, an inhalable form of insulin. Credit: Frank Rumpenhorstâdpa /Landov. For people with diabetes mellitus, the year 1921 is a meaningful one. That was the year Canadian physician Frederick Banting and medical student Charles H. Best discovered the hormone insulin in pancreatic extracts of dogs.On July 30, 1921, they injected the hormone into a diabetic dog and found that it effectively lowered the dogâs blood glucose levels to normal.hat was the year Canadian physician Frederick Banting and medical student Charles H. Best discovered the hormone insulin in pancreatic extracts of dogs. On July 30, 1921, they injected the hormone into a diabetic dog and found that it effectively lowered the dogâs blood glucose levels to normal.
Insulin is synthesized in significant quantities only in beta cells in the pancreas. It is secreted primarily in response to elevated blood concentrations of glucose. Insulin thus can regulate blood glucose and the body senses and responds to rise in blood glucose by secreting insulin.