2. Once you recognize that this is a single replacement problem, determine whether the non-bonded element is a cation or anion. Then determine which element it will replace. Remember cations can only replace cations and anions can only replace anions.
If you haven't eaten for several hours and your blood sugar level drops, another hormone from your pancreas called glucagon signals your liver to break down the stored glycogen and release glucose back into your bloodstream.
Cells in the pancreas make enzymes which help with digestion-but other pancreatic cells (known as the Islets of Langerhans) make the hormones which control your blood glucose levels too. When your blood sugar levels fall below the ideal level your pancreas releases a different hormone called glucagon.