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.
A low white blood cell count can be caused by a range of different conditions, from diseases to bone marrow failure, according to the National Institutes of Health. It can also be caused by a vitamin deficiency, though not generally as a result of a B-12 deficiency.