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2-001 - H2 DIGESTION H.2.1 State that digestive juices are...

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Unformatted text preview: H2 DIGESTION H.2.1. State that digestive juices are secreted into the alimentary canal by glands, including salivary glands, gastric glands in the stomach wall, the pancreas and the wall of the small intestine. Salivary glands. Secrete saliva into the mouth. Saliva contains salivary amylase. Gastric glands. In the inner lining of the stomach. Secrete mucus, hydrochloric acid and pepsinogen, the precursor of gegsin. Enzymes are activated only when out of their glands. Pancreas. Secretes pancreatic juice. Connects to the small intestine (duodenum) through a duct. Pancreatic juice contains proteases ltrygsin), gancreatic amylase ligase and bicarbonate ions. Liver. Secretes bile. Bile enters the small intestine straight from the liver and from the gallbladder, where it is stored. Bile emulsifies lipids to increase their surface area. Gastric glands. Secrets a variety of enzymes. Some enzymes go to the chime to help digestion and other are transmembrane proteins that facilitate digestion. H.2.2. Explain the structural features of exocrine gland cells. A gland is an organ that produces chemicals that are released into the blood (endocrine glands) to into a body cavity or outside the body (exocrine glands). The products of exocrine glands are released through ducts (tubes). Because of their function, exocrine gland cells are rich in ribosomes, mitochondria and vesicles. They have a well developed ER and Golgi apparatus. ...
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