Topic 6.1 Flashcards
Produce an annotated diagram of the digestive system.
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Label the following diagram of the villi
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Label the following diagram of the small intestine.
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Peristalsis
- Involuntary contraction of circular and longitudinal muscles
- Move food in one direction only (away from mouth)
To where does the pancreas secrete enzymes?
- The pancreas secretes enzymes into the lumen of the small intestine
List the enzymes in pancreatic juice and their reactions
- Amylase (starch –> maltose)
- Lipase (triglycerides, phospholipids –> glycerol and fatty acids)
- Proteases (proteins/peptides –> amino acids)
Outline the function of mouth
- Voluntary control of eating and swallowing
- Mechanical digestion of food by chewing and mixing with saliva
- Chemical digestion of starch with amylase in saliva
Outline the function of saliva
- Lubricants
- Enzymes that start starch digestion (amylase)
Outline the function of esophagus
- Movement of food by peristalsis from the mouth to the stomach
Outline the function of small intestine
- Final stages of digesion of lipids, carbohydrates, proteins, and nucleic aics
- Neutralize stomach acid (in duodenum)
- Absoption of nutrients
What are the three parts of small intestine?
Duodenum, jejunum, ileum
Outline the function of pancreas
Secretion of lipase, amylase and protease
Outline the function of liver
Secretion of surfactants in bile to break up lipid droplets
Outline the function of Gall bladder
Storage and regulated release of bile
Outline the function of large intestine
- Reasbsorption of water
- Further digestion especially of carbohydrates by symbiotic bacteria
- Formation and storage of feces