Digestion and absorption
Understandings:
The pancreas secretes enzymes into the lumen of the small intestine.
Know that amylase, lipase and an endopeptidase are secreted by the pancreas.
The name trypsin and the method used to activate it are not required.
Enzymes digest most macromolecules in food into monomers in the small intestine.
Know that starch, glycogen, lipids and nucleic acids are digested into monomers and that cellulose remains undigested.
Starch (amylose) --> disaccharides(maltose) --> monosaccharides (glucose)
Glycogen --> glucose
Lipids --> Glycerol and 3 fatty acids
Nucleic acids (DNA< RNA< ATP) --> a sugar (deoxyribose or ribose), a phosphate, and a nitrogen base
Cellulose = walls of plants cells - 'fiber' in your diet
Skill: Production of an annotated diagram of the digestive system. Be sure to be able to label and annotate the diagram.
The pancreas secretes enzymes into the lumen of the small intestine.
Know that amylase, lipase and an endopeptidase are secreted by the pancreas.
The name trypsin and the method used to activate it are not required.
Enzymes digest most macromolecules in food into monomers in the small intestine.
Know that starch, glycogen, lipids and nucleic acids are digested into monomers and that cellulose remains undigested.
Starch (amylose) --> disaccharides(maltose) --> monosaccharides (glucose)
Glycogen --> glucose
Lipids --> Glycerol and 3 fatty acids
Nucleic acids (DNA< RNA< ATP) --> a sugar (deoxyribose or ribose), a phosphate, and a nitrogen base
Cellulose = walls of plants cells - 'fiber' in your diet
Skill: Production of an annotated diagram of the digestive system. Be sure to be able to label and annotate the diagram.
Different methods of membrane transport are required to absorb different nutrients.
Application: Processes occurring in the small intestine that result in the digestion of starch and transport of the products of digestion to the liver.
Watch the interactive below to follow a meal, from ingestion to absorption, of all 4 types of nutrients
Application: Processes occurring in the small intestine that result in the digestion of starch and transport of the products of digestion to the liver.
Watch the interactive below to follow a meal, from ingestion to absorption, of all 4 types of nutrients
Application: Use of dialysis tubing to model absorption of digested food in the intestine.
Utilization:
Some hydrolytic enzymes have economic importance, for example amylase in production of sugars from starch and in the brewing of beer.
Some hydrolytic enzymes have economic importance, for example amylase in production of sugars from starch and in the brewing of beer.
Gobble different types of food and see what enzymes are needed and where nutrients are broken down.
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The contraction of circular and longitudinal muscle of the small intestine mixes the food with enzymes and moves it along the gut.
Skill: Identification of tissue layers in transverse sections of the small intestine viewed with a microscope or in a micrograph. Tissue layers should include longitudinal and circular muscles, mucosa and epithelium.
Skill: Identification of tissue layers in transverse sections of the small intestine viewed with a microscope or in a micrograph. Tissue layers should include longitudinal and circular muscles, mucosa and epithelium.