Was salivary amylase able to digest cellulose? Why or why not?
No because we do not have the enzyme cellulase
Effect of bacteria on cellulose digestion
Bacteria can digest cellulose if they have cellulase
Where is pepsin secreted?
Found in the stomach so secreted in the stomach
Optimal pH for pepsin
Where is lipase secreted?
From the stomach and pancreas
Optimal pH for lipase
pH of 2 for the stomach. pH of 8 for the pancreas (duodenum has basic environment)
What was the effect of bile salts on lipid digestion?
Emulsification - mechanical digestion because don't change lipid globules
Iodine Potassium Iodide. Test for starch.
Test for reducing sugar
Measure light absorption through liquid medium
Measure the level of hydrogen ion
Examples of physical process of digestion
1. Chewing (mastication) 2. Emulsification (breaking fat globules into fat goblets) 3. Segmentation (longitudinal smooth muscle contracts along the esophagus and small intestine, oblique smooth muscle contracts in the stomach)