In fact, they must be broken down into these individual glucose molecules before the cells can actually uptake those glucose molecules and store the glucose as glycogen, or break down the glucose to form ATP molecules. So the question is, what are these enzymes, digestive enzymes, proteases, that basically break down these carbohydrates into their individual monomeric form? Well, we have many different types of enzymes, and I've listed six enzymes, actually seven enzymes on the board. And let's begin with a salivary alpha amylase. So salivary simply means it exists in a saliva. So when we eat food and where we're chewing the food, that saliva actually contains a specific type of digestive enzyme and proteins known as alpha amylase.