The document discusses electrolyte imbalances in the human body. It begins by describing the distribution of body fluids between intracellular fluid (ICF) and extracellular fluid (ECF). It then discusses the major electrolytes - sodium, potassium, calcium, magnesium, chloride and bicarbonate - and how they are regulated. Specific electrolyte imbalances like hyponatremia, hypernatremia, hypokalemia, hyperkalemia, hypocalcemia, hypercalcemia and their causes and symptoms are then outlined. The document concludes by briefly mentioning fluid disturbances like hypochloremia and hyperchloremia.