Zoology - Chemical Coordination and Integration Question with Solution | TestHub

The correct answer is option (3) because - Epinephrine is an emergency hormone, also known as adrenaline and is secreted from adrenal medulla. - Thyroxine is secreted from thyroid gland and plays an important role in regulation of basal metabolic rate. - Oxytocin is a peptide hormone synthesised by hypothalamus and released by posterior pituitary. It causes smooth muscle contraction. - Glucagon is secreted from $\alpha$-cells of pancreas, acts mainly on hepatocytes and stimulates glycogenolysis resulting in an increased blood sugar level or hyperglycemia.