Your saliva produces enzymes to break down food and your stomach has them too, but I am pretty sure that your stomach doesn't produce as much as your saliva.
yes
Stomach enzymes would have a considerably lower optimum pH than most other enzymes found in the human body.
The esophagus does not produce any enzymes. Even so, sometimes digestive enzymes produced in the stomach can make their way into the esophagus due to a hernia or a condition called gastroesophagic reflux.
They produce digestive juices, a combination of chemicals and enzymes including; HCL, intrinsic factor, and pepsinogen.
expressed in the stomach but not expressed in the small intestine
Hormonal stimulus
because each enzyme has an own purpose
Most digestive enzymes are produced in the stomach. You will find that with the complex ducts throughout the human body these enzymes can travel to other areas of the digestive system. These areas include the salivary glands, the stomach, the pancreas, and the intestines.
Small Intestine,Stomach and third one i don't know
The esophagus does not produce any enzymes. Even so, sometimes digestive enzymes produced in the stomach can make their way into the esophagus due to a hernia or a condition called gastroesophagic reflux.
bicarb fluid
The stomach contains enzymes that break down protein.