Duodenum has characteristic Brunner's gland which secretes two hormones called
(a) prolactin, parathormone
(b) secretin, cholecystokinin
(c) enterocrinin, duocrinin
(d) gastrin, enterogastrone
(b) Secretin and cholecystokinin are secreted by Brunner's gland located in duodenum. Secretin causes the pancreas to secret alkaline pancreatic juice and stimulates bile production in the liver. Cholecystokinin induces the gall bladder to contract and eject bile into the intestine and stimulates the pancreas to secrete its degestive enzymes.