Organ systems and tissues -- The cell -- Water, pH, buffers, general features of receptors, channels and pumps -- Proteins -- Enzymes -- Insulin and sugars -- Glycogen and glycogenolysis -- Glycolysis and gluconeogensis -- Lipids -- Nucleic acids and molecular genetics -- Protein biosynthesis -- Transcription -- Metabolism of amino acids -- Metabolism of fat, carbohydrate and nucleic acids -- Polypeptide hormones -- Steroid hormones -- Growth factors and cytokines -- Membrane transport -- Micronutrients (metals and iodine) -- Vitamins and nutrition -- Blood and lymphatic system.