Hypothalamus--->Hypophyseal vs Neurohypophysis-->anterior/ posterior pituitary, to increase/decrease hormone production; PRL, GH, TSH, ACTH, FSH, LH, ADH, Oxytocin, T3, T4, calcitonin, PTH, aldosterone, cortisol, cortisone, epinephrine, melatonin, insulin, glucagon, testosterone, estrogens and progesterone.