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Activity of Salivary Amylase:
1. What is the composition of saliva? What are its functions?
2. What are the principal salivary glands in man?
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Solved in 4 steps
- Activity of Salivary Amylase: 1. Is there a difference in the time to dissolve the small and larger biscuit/cracker? Explain. 2. Explain your observations with the banana and egg.Water Absorption During Digestion While both the small and large intestines absorb water, they do not share the job equally. Consider the following typical measurements: Volume entering the small intestine: 9,400 mL Volume entering the large intestine: 750 mL Volume leaving the large intestine: 300 mL What percentage of the water entering the small intestine is absorbed by the small intestine? What percentage of the water entering the small intestine is absorbed by the large intestine? What percentage of the water entering the small intestine is not absorbed during the digestive process?The composition of saliva varies from gland to gland. Discuss how saliva produced by the parotid gland differs in action from saliva produced by the sublingual gland.
- Which of these is involved in the chemical digestion of protein? pancreatic amylase trypsin sucrase pancreatic nucleaseDescribe the different ways in which food is chemically digested, including the role of the various components of saliva, gastric juice, pancreatic juice, and bileExplain which hormones control the release of the each of these secretions, the cells used (acinar, parietal cells, etc), and a description of what molecules are being digested and what they are being broken intoBriefly describe the components of the four major types of lipoproteins and explain the function of each in relation to lipid metabolism in humans.
- Intestinal trouble in paradise While visiting a foreign country with poor- quality water, Beth and Tom each had a drink with ice during dinner. Many travelers avoid drinking the water in foreign countries but forget that ice is often made with local tap water! As a result, both Beth and Tom contracted an intestinal disease that causes severe diarrhea. (Diarrhea is characterized by loose watery bowel movements that, if left untreated, can cause serious health complications.) It is estimated that each year such "traveler's diarrhea" affects as many as 10 million Americans. High-risk destinations include the lesser-developed countries of Latin America, Africa, the Middle East, and regions of Asia. The Centers for Disease Control and Prevention (CDC) maintains a website to advise travelers. After 2 days of experiencing uncontrolled bouts of diarrhea, the couple sought medical attention at a nearby medical clinic. Various tests revealed that the culprit was the bacterium Escherichia coli.…a. Will salivary amylase hydrolyze glycogen? Explain. b. Will salivary amylase hydrolyze cellulose? Explain. c. Will salivary amylase hydrolyze sucrose? Explain.Describe the main actions in the mouth, stomach, small intestine, and large intestine during lipid digestion and absorption. Describe the substrate(s) and product(s) of each of the give major enzymes we discussed: lingual lipase, gastric lipase, pancreatic lipase, phospholipase A2, and carboxyl ester lipase. Describe emulsification of lipids. Why does this need to happen for digestion and absorption to occur? Describe how lipids are absorbed at the apical membrane. Describe lipid transport in the enterocyte. Describe lipid transport across the basolateral membrane and into circulation. Define the brain-gut axis and give examples of how lipids impact. Give examples of symptoms related to malabsorption of lipids. Give examples of diseases/conditions involving malabsorption of lipids.
- Provide an explanation for the following observations;(a)fat are broken down into fatty acids and monoglycerides in the intestinal lumen but appear later in the blood as fat droplets.(b)how bile acids the digestive process even though it contains no enzymes .. Atropine is an alkaloid found in some plants: belladonna, dope, and bleach. It is part of the drugs belonging to the group of antispasmodics that relieve smooth muscle spasms. Such drugs are used for spastic pain and stomach, intestines, to relax the smooth muscles of the bile ducts. What is the mechanism of action of this substance?In the duodenum lipid stimulate cck secretion. Explain how this would affect gastric emptying, pancreatic function, gallbladder secretion, and the sensation of hunger.