The students conducted a second experiment, using raw chicken liver as they did in the previous experiment. they modified
the chicken liver and used: one whole piece one piece cut into two, a piece that they pulverized in a blender. all the livers were
the same mass. the tiver was placed in test tubes and hydrogen peroxide was then added to each. here are their results:
chicken liver and enzyme action
liver condition rate of fizzing
whole
9
two pieces 11
pulverized
in the second experiment, how does the students' design mimic the digestive process?
there is little difference between the various states of the chicken liver
and the rate of digestion.
the blending or pulverization represents mechanical digestion and the
enzyme activity represents chemical digestion.
in the second experiment, the students represent chemical digestion by
adding the hydrogen peroxide to the chicken liver.
changing the condition of the liver represents mechanical digestion;
adding the hydrogen peroxide represents chemical digestion.