i believe it is the vagus nerve
duodenum
The medulla does.
It inhibits the secretions of the stomach.
The stomach!
Protein digestion in the stomach results primarily from secretions released by the gastric glands. The enzyme that is secreted is called pepsinogen.
The solarplexus is the nerve complex at the pit of the stomach.
The two nuclei of the Facial nerve in the pons are the motor nucleus (located in the lower pons) which controls the muscles of facial expression, and the superior salivatory nucleus (located in the upper pons) which regulates salivary gland secretions.
the body of the stomach
pepsinogen mucus
A sphincter.
The Sphinctea
Gastric acid is part of the "juices" produced by the stomach.