Hurry!!!! DESPERATE BIO QUESTION, plz help!!!?

Question

If chemical digestion begins in areas of the digestive system that proceede the pancreas, why does pancreatitis inhibit complete chemical digestion and absorbtion? In other words, why is the pancreas necessary to the digestive system if chemical digestion begins in the mouth and the stomach???

Answer 1

Because we need insulin to function and the pancreas to provide us with it.

Answer 2

yes,in u r view chemicals start acting on food from the start of the mouth, but those chemicals are not enough to digest all components of food, just like fat and pancreas also release some .

hormones to activate other enzymes.

It is both exocrine (secreting pancreatic juice containing digestive enzymes) and endocrine (producing several important hormones, including insulin, glucagon, and somatostatin). It also produces digestive enzymes that pass into the small intestine. These enzymes help in the further breakdown of the carbohydrates, protein, and fat in the chyme.

exocrine enzymes flow in to blood to control the sugar level in our body.

Answer 3

The main problems in pancreatitis stem from the pancreases inability to form, or overproduction of enzymes, most importantly lipase and amylaze.

Digestion of proteins is initiated by pepsin in the stomach, but the bulk of protein digestion is due to the pancreatic proteases. Several proteases are synthesized in the pancreas and secreted into the lumen of the small intestine. The two major pancreatic proteases are trypsin and chymotrypsin, which are synthesized and packaged into secretory vesicles as an the inactive proenzymes trypsinogen and chymotrypsinogen

A major component of dietary fat is triglyceride, or neutral lipid. A triglyceride molecule cannot be directly absorbed across the intestinal mucosa. Rather, it must first be digested into a 2-monoglyceride and two free fatty acids. The enzyme that performs this hydrolysis is pancreatic lipase, which is delivered into the lumen of the gut as a constituent of pancreatic juice.

Sufficient quantities of bile salts must also be present in the lumen of the intestine in order for lipase to efficiently digest dietary triglyceride and for the resulting fatty acids and monoglyceride to be absorbed. This means that normal digestion and absorption of dietary fat is critically dependent on secretions from both the pancreas and liver.

The major dietary carbohydrate for many species is starch, a storage form of glucose in plants. Amylase (technically alpha-amylase) is the enzyme that hydrolyses starch to maltose (a glucose-glucose disaccharide), as well as the trisaccharide maltotriose and small branchpoints fragments called limit dextrins. The major source of amylase in all species is pancreatic secretions, although amylase is also present in saliva of some animals, including humans.