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.
The anti-epileptic drugs phenytoin and phenobarbitone can lower the white cell count as can phenothiazines and penicillin. Deficiency of Vitamin B12 and folate deficiency can also reduce the number of white cells but such deficiency is usually accompanied by other signs in the blood. A low white cell count can also be a feature of autoimmune disease.