A. Epinephrine (Adrenaline) is rapidly secreted in response to stress and emergency situations and is called the 'emergency hormone' . B. Thyroxine (Thyroid hormone) plays an important role in the regulation of the basal metabolic rate (BMR) . C. Oxytocin acts on the smooth muscles of the body and stimulates their contraction (e.g., uterine contraction) . D. Glucagon acts mainly on liver cells to stimulate glycogenolysis and gluconeogenesis, resulting in increased blood sugar (hyperglycemia) .