Answer:
Bile, a yellow-green bitter fluid that is produced by liver cells, is continuously produced and then stored in the gallbladder until needed. It is a digestive liquid which emulsifies fats and neutralizes acids in partly digested food to aid in digestion. When the stomach senses the presence of fat it secretes a hormone called cholecystokinin which signals the gall bladder to contract and release the bile into the first part of the small intestine where it mixes with the food as it leaves the stomach.