Digestive hormones produced by the wall of the duodenum that control secretions include cholecystokinin and .

The digestive hormone produced by the wall of the duodenum, alongside cholecystokinin, is secretin.

Explanation:

1. Cholecystokinin (CCK) - This hormone is released in response to the presence of fats and proteins in the duodenum. It stimulates the gallbladder to contract and release bile, which helps in fat digestion, and it also promotes the release of digestive enzymes from the pancreas.

2. Secretin - This hormone is released when acidic chyme from the stomach enters the duodenum. Its primary function is to stimulate the pancreas to release bicarbonate, which neutralizes stomach acid, and to inhibit gastric acid secretion from the stomach.

Both hormones play crucial roles in regulating the digestive process and ensuring that the pH levels in the duodenum are optimal for enzymatic activity. Together, they coordinate the digestive process, ensuring efficient digestion and absorption of nutrients.