Iodine reagent is to be and give explanations for the reaction using raw data used to test for starch results. and graphs. Draw every 30 seconds. conclusions and give explanations for the Temperature must be results. controlled by use of a water bath or electric heater. 4.2.2.1 Human digestive Explain why need to be 2 Observe a model for digestion Use bead Model: Strings of enzymes digested into small, soluble using popper beads to popper beads. Investigate the action of molecules. illustrate large molecules being Enzymes in the amylase on starch using gut: amylase broken into smaller ones. digestive system Describe the three types of a model gut or interpret solution, starch chemically digest food enzymes involved in Introduce the names of the the results using the solution, cellulose into small, soluble digestion, including the three groups of digestive computer simulation. tubing, beaker, molecules that can be names of the substrates, enzymes, what they digest and iodine solution, absorbed. products and where the the products formed. Present Benedict’s solution, enzymes are produced. the information in a table. test tubes, spotting Names of enzymes tile, waterbath. with substrates, products and sites of production. Demo: large trough Explain how bile in the Discuss the role of bile and Bile is made by the of water, greasy digestion of fats. demonstrate the action of Watch the demos and liver and stored in the frying pan, washing washing up liquid on fats. discuss the outcomes. Interpret graphs to determine gall bladder. It helps in up liquid, tube of Demonstrate the effect of bile Explain why pH is the optimum temperature or the digestion of fats by water and olive oil salts on the rate of digestion of measured to indicate the pH for an enzyme. neutralising acid from Demo: two tubes full milk using a pH indicator. rate of fat digestion. the stomach and cream milk, sodium emulsifying fats. carbonate solution,
Iodine reagent is to be used to test for starch every 30 seconds. Temperature must be controlled by use of a water bath or electric heater. and give explanations for the results. reaction using raw data and graphs. Draw conclusions and give explanations for the results. 4.2.2.1 Human digestive enzymes Enzymes in the digestive system chemically digest food into small, soluble molecules that can be absorbed. Names of enzymes with substrates, products and sites of production. Bile is made by the liver and stored in the gall bladder. It helps in the digestion of fats by neutralising acid from the stomach and emulsifying fats. Explain why need to be digested into small, soluble molecules. Describe the three types of enzymes involved in digestion, including the names of the substrates, products and where the enzymes are produced. Explain how bile in the digestion of fats. Interpret graphs to determine the optimum temperature or pH for an enzyme. 2 Observe a model for digestion using popper beads to illustrate large molecules being broken into smaller ones. Introduce the names of the three groups of digestive enzymes, what they digest and the products formed. Present the information in a table. Discuss the role of bile and demonstrate the action of washing up liquid on fats. Demonstrate the effect of bile salts on the rate of digestion of milk using a pH indicator. Use bead Investigate the action of amylase on starch using a model gut or interpret the results using the computer simulation. Watch the demos and discuss the outcomes. Explain why pH is measured to indicate the rate of fat digestion. Model: Strings of popper beads. gut: amylase solution, starch solution, cellulose tubing, beaker, iodine solution, Benedict’s solution, test tubes, spotting tile, waterbath. Demo: large trough of water, greasy frying pan, washing up liquid, tube of water and olive oil Demo: two tubes full cream milk, sodium carbonate solution,
AQA-8461-SOW-ORG.DOCX