In horses,rabbits,and hares,the cellulose is digested in the

Identify the enzymes at $A$ and $B$ which hydrolyze the substrates.
Proteins $\xrightarrow{ A }$ $\begin{array}{c}\text{peptones} \\ + \\ \text{proteoses}\end{array}$ $\xrightarrow{ B }$ polypeptides

Digestion of protein takes place in

The food mixes thoroughly with the acidic gastric juice of the stomach by the churning movements of its muscular wall. What do we call the food then?

Proteins are broken down into amino acids in the .......

Ptyalin cannot act in the stomach because it becomes $......$.