Which digestive process does not occur in the stomach for carbohydrates?

The process of enzymatic breakdown of carbohydrates does not occur in the stomach. While the stomach is primarily involved in the digestion of proteins and the mixing of food with gastric juices, the specific enzymes responsible for carbohydrate digestion are not active in this environment.

In the mouth, salivary amylase starts the digestion of carbohydrates, breaking them down into simpler sugars. However, once the food reaches the stomach, the acidic environment (due to gastric acids) inactivates salivary amylase, halting further carbohydrate digestion. The stomach's role primarily involves mechanical digestion and the enzymatic breakdown of proteins, not carbohydrates.

As for the other processes, absorption of nutrients does occur at the level of the stomach, albeit limited, as well as mechanical digestion where the stomach churns food to mix it with gastric juices. The production of digestive acids is also a significant function of the stomach, as these acids aid in the overall digestive process. Hence, while mechanical digestion and acid production happen in the stomach, and some nutrient absorption can take place, enzymatic breakdown of carbohydrates is not one of the digestive functions performed there.