Final answer:
The digestion of complex carbohydrates starts in the mouth with the secretion of salivary amylase.
Step-by-step explanation:
The digestion of complex carbohydrates starts in the mouth with the secretion of salivary amylase. Salivary amylase acts on cooked starch and releases maltose. However, the digestion of carbohydrates in the mouth is not complete, as the food remains there for a short duration of time.