The pancreas is an elongated , yellowish gland. It consists largely of lobules that secrete pancreatic juice which help in digestion.
Interspersed at random among the lobules are islands of langerhans which produce hormones.
They secrete four hormones : insulin , glucagon , somatostatin and pancreatic polypeptide .
Insulin- it is secreted by the beta cells on stimulation by a rise in blood -glucose level .it enables the liver and muscles to store glucose as glycogen and enables the tissue to take up and use glucose as a source of energy.Insulin is anabolic hormone.
Glucagon- it is secreted by the alpha cells of the islands of langerhans in response to fall in blood glucose level. Its action is opposite to that of insulin.it brings about change of liver glycogen to blood glucose.
Somatostatin – It is secreted by the delta cells . This hormone decreases the rate of nutrient absorption into the bloodstream from the gastrointestinal tract. It also inhibits the secretion of hypophysial growth hormone, also an inhibitor for both insulin and glucagon.
Pancreatic polypeptide – It is secreted by the F cells . It inhibits the release of pancreatic juice.
Final Answer: The hormones secreted by pancreas are insulin , glucagon , somatostatin and pancreatic polypeptide .