Suggest you do vagina, bladder, and CSF.
expressed in the stomach but not expressed in the small intestine
because each enzyme has an own purpose
Yes, enzymes are present in the stomach. The main enzyme in the stomach is pepsin, which helps break down proteins into smaller peptides for digestion. These enzymes are secreted by the stomach lining to aid in the digestion process.
pepsin
Nothing is in the stomach except brain
Stomach enzymes are specialized to function in the acidic environment of the stomach, whereas other enzymes may function in a neutral or alkaline environment. Stomach enzymes such as pepsin are mainly involved in digesting proteins, while other enzymes may have diverse roles in metabolism, signaling, or other biochemical processes. Stomach enzymes are secreted by the stomach lining in response to food intake, while other enzymes may be produced in various organs or tissues throughout the body.
First, food goes to stomach where pepsin (a protease enzyme) is released into the stomach. The food then enters the small intestine and at this point, any pancreatic enzymes are released from the pancreas. The enzymes present in the small intestine include: Lactose, DPP IV and dissacharrides.
pepcin
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.
No, enzymes like salivary amylase will denature when subjected to the low pH of the gastric juices. This is why there are similar, but slightly different enzymes released in the stomach. Some (like pepsin) are only activated through the high hydrochloric acid concentration.
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.
Acids and enzymes are what begin the process of "digesting" our food. Saliva supplies many of the enzymes, the stomach supplies the acid.