SELF-TESTING EXERCISE 



381 



TABLE OF CHEMICAL DIGESTION 





Place of Di- 



Secretion 



Enzyme 



Medium 



Substance 



End Product 



gestion 



Formed 



Contained 



Required 



Digested 



Formed 



Mouth 



Saliva 



Ptyalin 



Alkaline 



Starch 



Grape 



sugar 



Stomach 



Gastric 

 juice 



Pepsin 



Acid 



Protein 



Proteoses 



and 

 peptones 







Rennin 



Acid 



Casein of 

 milk 



Curd 



Small 



Pancreatic 



Amylase 



Alkaline 



Starch 



Grape 



Intestine 



juice 









sugar 







Trypsin 



Alkaline 



Proteins 



Amino 



acids 







Lipase 



Alkaline 



Fats 



Fatty acid 



and 



glycerol 





Intestinal 



Erepsin 



Alkaline 



Proteoses 



Amino 





juice 







and pep- 

 tones from 

 stomach 



acids 







Maltase 



Alkaline 



Maltose 

 (grape 

 sugar) 



Glucose 







Sucrase 



Alkaline 



Cane sugar 



Glucose 







Lactase 



Alkaline 



Milk sugar 



Glucose 



Self-Testing Exercise 



Check the correct statements in your notebook : 



T. F. 1. The villi are hollow hairs which suck up digested food. 



T. F. 2. A villus absorbs food through the cells covering its surface. 



T. F. 3. The large intestine contains many bacteria which cause the 

 decay of the wastes held therein. 



T. F. 4. The digestive fluids in the small intestine ultimately change 

 proteins to amino acids in which form they pass into the blood. 



T. F. 5. The gastric juice changes sugar to starches. 



T. F. 6. The surface of the small intestine is increased by the villi 



