Sucrose, Maltase and Lactase.
the organic compound commonly known as table sugar and sometimes called saccharose. Its is a white, odorless, crystalline powder with a sweet taste, it is best known for its nutritional role.
Maltase is an enzyme that breaks down the disaccharide maltose. Maltase is an enzyme that catalyzes the hydrolysis of the disaccharide maltose to the simple sugar glucose. This enzyme is found in plants, bacteria, and yeast.
Lactase is a glycoside hydrolase involved in the hydrolysis of the disaccharide lactose into constituent galactose and glucose monomers. Lactase is present predominantly along the brush border membrane of the differentiated enterocytes lining the villi of the small intestine. Lactase is essential for digestive hydrolysis of lactose in milk. Deficiency of the enzyme causes lactose intolerance
Nucleases and Peptidases
Nucleases is an enzyme capable of cleaving the phosphodiester bonds between the nucleotide subunits of nucleic acids.
Peptidases are enzymes that hydrolyze proteins.
Pancreatic Juice, Amylase and Lipase
Pancreatic Juice is a liquid secreted by the pancreas, which contains a variety of enzymes like, trypsinogen, chymotrypsinogen, elastase, carboxypeptidase, pancreatic lipase, and amylase.
Pancreatic Amylase is an enzyme that catalyzes the hydrolysis of starch into simpler compounds.
Pancreatic Lipase secreted from the pancreas, and is the primary lipase (enzyme) that breaks down dietary fat molecules in the human digestive system, converting triglyceride substrates found in ingested oils to monoglycerides and free fatty acids.
Cholecystokinin
is a peptide hormone of the gastrointestinal system responsible for stimulating the digestion of fat and protein.
Gastrin
is a peptide hormone that stimulates secretion of gastric acid or HCL by the parietal cells of the stomach and aids in gastric motility. It is released by G cells in the antrum of the stomach, duodenum, and the pancreas.
Bile and Bile Salts
is a bitter-tasting, dark green to yellowish brown fluid, produced by the liver of most vertebrates, that aids the process of digestion of lipids in the small intestine. In many species, bile is stored in the gallbladder and upon eating is discharged into the duodenum. Bile is a composition of the following materials: water, bile salts, mucus and pigments, fats, inorganic salts and cholesterol.
Bile salts are bile acids compounded with a cation, usually sodium.
Liver and Gallbladder
The liver is the heaviest organ in the body and is one of the largest. It’s located in the upper right part of your belly under the ribs and is responsible for functions vital to life. The main functions of the liver is to process nutrients from food, make bile, remove toxins from the body and build proteins.
The Gallbladdar is a small pear-shaped muscular sack that acts as a storage tank for bile. The bile is made in the liver by liver cells and is sent through tiny ducts or canals to the duodenum and to the gallbladder. The gallbladder stores the bile to have it available in larger quantities for secretion when a meal is eaten.
Microvilli
are microscopic cellular membrane protrusions that increase the surface area of cells. They are involved in a wide variety of functions, including absorption, secretion, cellular adhesion, and mechanotransduction.
Small and Large Intestine, jejunum, ileum.
The small intestine is the part of the gastrointestinal tract following the stomach and followed by the large intestine, and is where much of the digestion and absorption of food takes place.
Large Intestine is the third-to-last part of the digestive system in us humans. Its function is to absorb water from the remaining indigestible food matter, and then to pass useless waste material from the body.
The Jejunum is the middle section of the small intestine.
The Ileum is the final section of the small intestine.
Pyloric Sphincter/Valve
is the region of the stomach that connects to the duodenum.
Duodenum: is the beginning of the small intestines.
The pyloric Sphincter is divided into two parts:
•the pyloric antrum, which connects to the body of the stomach.
•the pyloric canal, which connects to the duodenum.
The pyloric sphincter, or valve, is a strong ring of smooth muscle at the end of the pyloric canal which lets food pass from the stomach to the duodenum.