Which hormone causes contraction of gallbladder to release bile ?
Gastrin
Duocrinin
Enterocrinin
Cholecystokinin
Cholecystokinin-Pancreozymin (CCK-PZ) : It is secreted by small intestine and acts on Gall bladder and pancreas.It causes contraction of gall bladder to release bile. It also stimulates pancreas to release pancreatic juice