

- l-'2 - DIGESTION. 



6. Digestion of carbohydrate : action of the diastase in mammalian saliva. 



(a) Saliva seen to have an alkaline reaction ; 



(b) Saliva is added to a dilute starch solution coloured with iodine in a test-tube. 

 Note the rapid disappearance of the blue colour. 



7. Digestion of carbohydrate : action of invertase of mammalian intestine. 

 A piece of the small intestine of a rabbit has been kept overnight at 36 in a solution 

 of cane sugar. Fehling's test is now applied to the solution. 



