CHEMICAL AND PHYSICAL PROCESSES OF DIGESTION
CHEMICAL AND PHYSICAL PROCESSES OF DIGESTION
CHEMICAL AND PHYSICAL PROCESSES OF DIGESTION
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Activities<br />
Activit y 1: Develop ing Hypoth eses for Experimen ts on Enzymatic D igest ion<br />
Work in groups according to instructors’ instructions, with each group taking responsibility for<br />
setting up and conducting one of the following experiments. In each of the digestive procedures being<br />
studied (starch, protein. and fat digestion) and in the amylase assay, you are directed to boil the contents<br />
of one or more test tubes. To do this, obtain a 250-ml beaker and a hot plate. Add about 125 ml of water<br />
to the beaker and bring to a boil. Place the specimen in the boiling water for the time (min.) specified in<br />
the directions.<br />
Upon completion of the experiments, each group should communicate its results to the rest of the class by<br />
recording them on the chalkboard. All members of the class should observe the controls (the specimens<br />
or standards against which experimental samples are compared) as well as the positive and negative<br />
examples of all experimental results. Additionally, all members of the class should be able to explain the<br />
tests used and the results observed and anticipated for each experiment.<br />
• Develop a hypothesis for each of the enzymatic digestions studied in Activities 2-4: starch, protein,<br />
and fat.<br />
• Write down your hypotheses, including your reasoning behind each hypothesis.<br />
• Carry out the following activities.<br />
4